diff --git a/source/blender/blenkernel/intern/brush.cc b/source/blender/blenkernel/intern/brush.cc
index 6c926a71936..f1813f7841e 100644
--- a/source/blender/blenkernel/intern/brush.cc
+++ b/source/blender/blenkernel/intern/brush.cc
@@ -738,7 +738,7 @@ void BKE_gpencil_brush_preset_set(Main *bmain, Brush *brush, const short type)
       brush->gpencil_settings->active_smooth = ACTIVE_SMOOTH;
       brush->gpencil_settings->draw_angle = 0.0f;
       brush->gpencil_settings->draw_angle_factor = 0.0f;
-      brush->gpencil_settings->hardeness = 0.9f;
+      brush->gpencil_settings->hardness = 0.9f;
       copy_v2_fl(brush->gpencil_settings->aspect_ratio, 1.0f);
 
       brush->gpencil_tool = GPAINT_TOOL_DRAW;
@@ -761,7 +761,7 @@ void BKE_gpencil_brush_preset_set(Main *bmain, Brush *brush, const short type)
       brush->gpencil_settings->active_smooth = ACTIVE_SMOOTH;
       brush->gpencil_settings->draw_angle = 0.0f;
       brush->gpencil_settings->draw_angle_factor = 0.0f;
-      brush->gpencil_settings->hardeness = 1.0f;
+      brush->gpencil_settings->hardness = 1.0f;
       copy_v2_fl(brush->gpencil_settings->aspect_ratio, 1.0f);
 
       brush->gpencil_settings->flag |= GP_BRUSH_GROUP_SETTINGS;
@@ -796,7 +796,7 @@ void BKE_gpencil_brush_preset_set(Main *bmain, Brush *brush, const short type)
       brush->gpencil_settings->active_smooth = ACTIVE_SMOOTH;
       brush->gpencil_settings->draw_angle = 0.0f;
       brush->gpencil_settings->draw_angle_factor = 0.0f;
-      brush->gpencil_settings->hardeness = 1.0f;
+      brush->gpencil_settings->hardness = 1.0f;
       copy_v2_fl(brush->gpencil_settings->aspect_ratio, 1.0f);
 
       brush->gpencil_settings->flag &= ~GP_BRUSH_GROUP_SETTINGS;
@@ -833,7 +833,7 @@ void BKE_gpencil_brush_preset_set(Main *bmain, Brush *brush, const short type)
       brush->gpencil_settings->active_smooth = ACTIVE_SMOOTH;
       brush->gpencil_settings->draw_angle = 0.0f;
       brush->gpencil_settings->draw_angle_factor = 0.0f;
-      brush->gpencil_settings->hardeness = 1.0f;
+      brush->gpencil_settings->hardness = 1.0f;
       copy_v2_fl(brush->gpencil_settings->aspect_ratio, 1.0f);
 
       brush->gpencil_settings->flag |= GP_BRUSH_GROUP_SETTINGS;
@@ -870,7 +870,7 @@ void BKE_gpencil_brush_preset_set(Main *bmain, Brush *brush, const short type)
       brush->gpencil_settings->active_smooth = 0.3f;
       brush->gpencil_settings->draw_angle = DEG2RAD(35.0f);
       brush->gpencil_settings->draw_angle_factor = 0.5f;
-      brush->gpencil_settings->hardeness = 1.0f;
+      brush->gpencil_settings->hardness = 1.0f;
       copy_v2_fl(brush->gpencil_settings->aspect_ratio, 1.0f);
 
       brush->gpencil_settings->flag |= GP_BRUSH_GROUP_SETTINGS;
@@ -912,7 +912,7 @@ void BKE_gpencil_brush_preset_set(Main *bmain, Brush *brush, const short type)
       brush->gpencil_settings->active_smooth = ACTIVE_SMOOTH;
       brush->gpencil_settings->draw_angle = 0.0f;
       brush->gpencil_settings->draw_angle_factor = 0.0f;
-      brush->gpencil_settings->hardeness = 1.0f;
+      brush->gpencil_settings->hardness = 1.0f;
       copy_v2_fl(brush->gpencil_settings->aspect_ratio, 1.0f);
 
       brush->gpencil_settings->flag |= GP_BRUSH_GROUP_SETTINGS;
@@ -943,7 +943,7 @@ void BKE_gpencil_brush_preset_set(Main *bmain, Brush *brush, const short type)
       brush->gpencil_settings->active_smooth = ACTIVE_SMOOTH;
       brush->gpencil_settings->draw_angle = 0.0f;
       brush->gpencil_settings->draw_angle_factor = 0.0f;
-      brush->gpencil_settings->hardeness = 0.8f;
+      brush->gpencil_settings->hardness = 0.8f;
       copy_v2_fl(brush->gpencil_settings->aspect_ratio, 1.0f);
 
       brush->gpencil_settings->flag |= GP_BRUSH_GROUP_SETTINGS;
@@ -977,7 +977,7 @@ void BKE_gpencil_brush_preset_set(Main *bmain, Brush *brush, const short type)
       brush->gpencil_settings->active_smooth = ACTIVE_SMOOTH;
       brush->gpencil_settings->draw_angle = 0.0f;
       brush->gpencil_settings->draw_angle_factor = 0.0f;
-      brush->gpencil_settings->hardeness = 1.0f;
+      brush->gpencil_settings->hardness = 1.0f;
       copy_v2_fl(brush->gpencil_settings->aspect_ratio, 1.0f);
 
       brush->gpencil_settings->flag |= GP_BRUSH_GROUP_SETTINGS;
@@ -1004,7 +1004,7 @@ void BKE_gpencil_brush_preset_set(Main *bmain, Brush *brush, const short type)
       brush->gpencil_settings->fill_factor = 1.0f;
 
       brush->gpencil_settings->draw_strength = 1.0f;
-      brush->gpencil_settings->hardeness = 1.0f;
+      brush->gpencil_settings->hardness = 1.0f;
       copy_v2_fl(brush->gpencil_settings->aspect_ratio, 1.0f);
       brush->gpencil_settings->draw_smoothfac = 0.1f;
       brush->gpencil_settings->draw_smoothlvl = 1;
diff --git a/source/blender/blenkernel/intern/gpencil_curve_legacy.cc b/source/blender/blenkernel/intern/gpencil_curve_legacy.cc
index 7dfde5631b1..b30e32bd7d6 100644
--- a/source/blender/blenkernel/intern/gpencil_curve_legacy.cc
+++ b/source/blender/blenkernel/intern/gpencil_curve_legacy.cc
@@ -304,7 +304,7 @@ static void gpencil_convert_spline(Main *bmain,
   bGPDstroke *gps = static_cast<bGPDstroke *>(MEM_callocN(sizeof(bGPDstroke), "bGPDstroke"));
   gps->thickness = 1.0f;
   gps->fill_opacity_fac = 1.0f;
-  gps->hardeness = 1.0f;
+  gps->hardness = 1.0f;
   gps->uv_scale = 1.0f;
 
   ARRAY_SET_ITEMS(gps->aspect_ratio, 1.0f, 1.0f);
diff --git a/source/blender/blenkernel/intern/gpencil_legacy.cc b/source/blender/blenkernel/intern/gpencil_legacy.cc
index bf1711fc90c..d053f319539 100644
--- a/source/blender/blenkernel/intern/gpencil_legacy.cc
+++ b/source/blender/blenkernel/intern/gpencil_legacy.cc
@@ -727,7 +727,7 @@ bGPDstroke *BKE_gpencil_stroke_new(int mat_idx, int totpoints, short thickness)
 
   gps->thickness = thickness;
   gps->fill_opacity_fac = 1.0f;
-  gps->hardeness = 1.0f;
+  gps->hardness = 1.0f;
   copy_v2_fl(gps->aspect_ratio, 1.0f);
 
   gps->uv_scale = 1.0f;
@@ -1013,7 +1013,7 @@ void BKE_gpencil_stroke_copy_settings(const bGPDstroke *gps_src, bGPDstroke *gps
   gps_dst->inittime = gps_src->inittime;
   gps_dst->mat_nr = gps_src->mat_nr;
   copy_v2_v2_short(gps_dst->caps, gps_src->caps);
-  gps_dst->hardeness = gps_src->hardeness;
+  gps_dst->hardness = gps_src->hardness;
   copy_v2_v2(gps_dst->aspect_ratio, gps_src->aspect_ratio);
   gps_dst->fill_opacity_fac = gps_dst->fill_opacity_fac;
   copy_v3_v3(gps_dst->boundbox_min, gps_src->boundbox_min);
diff --git a/source/blender/blenkernel/intern/grease_pencil_convert_legacy.cc b/source/blender/blenkernel/intern/grease_pencil_convert_legacy.cc
index c8c4e81ac93..5c196b7065b 100644
--- a/source/blender/blenkernel/intern/grease_pencil_convert_legacy.cc
+++ b/source/blender/blenkernel/intern/grease_pencil_convert_legacy.cc
@@ -101,7 +101,7 @@ void legacy_gpencil_frame_to_grease_pencil_drawing(const bGPDframe &gpf,
     stroke_init_times.span[stroke_i] = float(gps->inittime);
     stroke_start_caps.span[stroke_i] = int8_t(gps->caps[0]);
     stroke_end_caps.span[stroke_i] = int8_t(gps->caps[1]);
-    stroke_hardnesses.span[stroke_i] = gps->hardeness;
+    stroke_hardnesses.span[stroke_i] = gps->hardness;
     stroke_point_aspect_ratios.span[stroke_i] = gps->aspect_ratio[0] /
                                                 max_ff(gps->aspect_ratio[1], 1e-8);
     stroke_fill_translations.span[stroke_i] = float2(gps->uv_translation);
diff --git a/source/blender/blenloader/intern/versioning_280.cc b/source/blender/blenloader/intern/versioning_280.cc
index b67d54cff1f..ad51f9ecfc3 100644
--- a/source/blender/blenloader/intern/versioning_280.cc
+++ b/source/blender/blenloader/intern/versioning_280.cc
@@ -5036,23 +5036,23 @@ void blo_do_versions_280(FileData *fd, Library * /*lib*/, Main *bmain)
     }
 
     /* init grease pencil brush gradients */
-    if (!DNA_struct_member_exists(fd->filesdna, "BrushGpencilSettings", "float", "hardeness")) {
+    if (!DNA_struct_member_exists(fd->filesdna, "BrushGpencilSettings", "float", "hardness")) {
       LISTBASE_FOREACH (Brush *, brush, &bmain->brushes) {
         if (brush->gpencil_settings != nullptr) {
           BrushGpencilSettings *gp = brush->gpencil_settings;
-          gp->hardeness = 1.0f;
+          gp->hardness = 1.0f;
           copy_v2_fl(gp->aspect_ratio, 1.0f);
         }
       }
     }
 
     /* init grease pencil stroke gradients */
-    if (!DNA_struct_member_exists(fd->filesdna, "bGPDstroke", "float", "hardeness")) {
+    if (!DNA_struct_member_exists(fd->filesdna, "bGPDstroke", "float", "hardness")) {
       LISTBASE_FOREACH (bGPdata *, gpd, &bmain->gpencils) {
         LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
           LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
             LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
-              gps->hardeness = 1.0f;
+              gps->hardness = 1.0f;
               copy_v2_fl(gps->aspect_ratio, 1.0f);
             }
           }
diff --git a/source/blender/draw/engines/eevee/shaders/effect_dof_reduce_frag.glsl b/source/blender/draw/engines/eevee/shaders/effect_dof_reduce_frag.glsl
index adf0312806e..1f9957889f5 100644
--- a/source/blender/draw/engines/eevee/shaders/effect_dof_reduce_frag.glsl
+++ b/source/blender/draw/engines/eevee/shaders/effect_dof_reduce_frag.glsl
@@ -48,8 +48,8 @@ float dof_scatter_screen_border_rejection(float coc, vec2 uv, vec2 screen_size)
   /* Full-resolution to half-resolution CoC. */
   coc *= 0.5;
   /* Allow 10px transition. */
-  const float rejection_hardeness = 1.0 / 10.0;
-  return saturate((min_screen_border_distance - abs(coc)) * rejection_hardeness + 1.0);
+  const float rejection_hardness = 1.0 / 10.0;
+  return saturate((min_screen_border_distance - abs(coc)) * rejection_hardness + 1.0);
 }
 
 float dof_scatter_luminosity_rejection(vec3 color)
diff --git a/source/blender/draw/engines/eevee_next/shaders/eevee_depth_of_field_reduce_comp.glsl b/source/blender/draw/engines/eevee_next/shaders/eevee_depth_of_field_reduce_comp.glsl
index d3f585487a1..2ad9f1ee895 100644
--- a/source/blender/draw/engines/eevee_next/shaders/eevee_depth_of_field_reduce_comp.glsl
+++ b/source/blender/draw/engines/eevee_next/shaders/eevee_depth_of_field_reduce_comp.glsl
@@ -55,8 +55,8 @@ float dof_scatter_screen_border_rejection(float coc, ivec2 texel)
   /* Full-resolution to half-resolution CoC. */
   coc *= 0.5;
   /* Allow 10px transition. */
-  const float rejection_hardeness = 1.0 / 10.0;
-  return saturate((min_screen_border_distance - abs(coc)) * rejection_hardeness + 1.0);
+  const float rejection_hardness = 1.0 / 10.0;
+  return saturate((min_screen_border_distance - abs(coc)) * rejection_hardness + 1.0);
 }
 
 float dof_scatter_luminosity_rejection(vec3 color)
diff --git a/source/blender/draw/intern/draw_cache_impl_gpencil_legacy.cc b/source/blender/draw/intern/draw_cache_impl_gpencil_legacy.cc
index 03c4fd70a09..f0d4ab71142 100644
--- a/source/blender/draw/intern/draw_cache_impl_gpencil_legacy.cc
+++ b/source/blender/draw/intern/draw_cache_impl_gpencil_legacy.cc
@@ -329,7 +329,7 @@ static void gpencil_buffer_add_point(GPUIndexBufBuilder *ibo,
   float aspect_ratio = gps->aspect_ratio[0] / max_ff(gps->aspect_ratio[1], 1e-8);
 
   vert->packed_asp_hard_rot = pack_rotation_aspect_hardness(
-      pt->uv_rot, aspect_ratio, gps->hardeness);
+      pt->uv_rot, aspect_ratio, gps->hardness);
 
   if (!is_endpoint) {
     /* Issue a Quad per point. */
@@ -567,7 +567,7 @@ bGPDstroke *DRW_cache_gpencil_sbuffer_stroke_data_get(Object *ob)
     gps->mat_nr = max_ii(0, gpd->runtime.matid - 1);
     gps->flag = gpd->runtime.sbuffer_sflag;
     gps->thickness = brush->size;
-    gps->hardeness = brush->gpencil_settings->hardeness;
+    gps->hardness = brush->gpencil_settings->hardness;
     copy_v2_v2(gps->aspect_ratio, brush->gpencil_settings->aspect_ratio);
 
     /* Reduce slightly the opacity of fill to make easy fill areas while drawing. */
diff --git a/source/blender/editors/gpencil_legacy/annotate_paint.cc b/source/blender/editors/gpencil_legacy/annotate_paint.cc
index 1a6a23ff896..327d18ef441 100644
--- a/source/blender/editors/gpencil_legacy/annotate_paint.cc
+++ b/source/blender/editors/gpencil_legacy/annotate_paint.cc
@@ -856,7 +856,7 @@ static void annotation_stroke_newfrombuffer(tGPsdata *p)
   gps->totpoints = totelem;
   gps->thickness = gpl->thickness;
   gps->fill_opacity_fac = 1.0f;
-  gps->hardeness = 1.0f;
+  gps->hardness = 1.0f;
   copy_v2_fl(gps->aspect_ratio, 1.0f);
   gps->uv_scale = 1.0f;
   gps->flag = gpd->runtime.sbuffer_sflag;
diff --git a/source/blender/editors/gpencil_legacy/gpencil_data.cc b/source/blender/editors/gpencil_legacy/gpencil_data.cc
index 4dc3459ab11..2dd715cadf3 100644
--- a/source/blender/editors/gpencil_legacy/gpencil_data.cc
+++ b/source/blender/editors/gpencil_legacy/gpencil_data.cc
@@ -922,7 +922,7 @@ static bool gpencil_frame_is_equal(const bGPDframe *gpf_a, const bGPDframe *gpf_
     if (gps_a->caps[1] != gps_b->caps[1]) {
       return false;
     }
-    if (gps_a->hardeness != gps_b->hardeness) {
+    if (gps_a->hardness != gps_b->hardness) {
       return false;
     }
     if (!equals_v2v2(gps_a->aspect_ratio, gps_b->aspect_ratio)) {
diff --git a/source/blender/editors/gpencil_legacy/gpencil_fill.cc b/source/blender/editors/gpencil_legacy/gpencil_fill.cc
index f4c45467495..6e8fec16ba3 100644
--- a/source/blender/editors/gpencil_legacy/gpencil_fill.cc
+++ b/source/blender/editors/gpencil_legacy/gpencil_fill.cc
@@ -2172,7 +2172,7 @@ static void gpencil_stroke_from_buffer(tGPDfill *tgpf)
   bGPDstroke *gps = static_cast<bGPDstroke *>(MEM_callocN(sizeof(bGPDstroke), "bGPDstroke"));
   gps->thickness = brush->size;
   gps->fill_opacity_fac = 1.0f;
-  gps->hardeness = brush->gpencil_settings->hardeness;
+  gps->hardness = brush->gpencil_settings->hardness;
   copy_v2_v2(gps->aspect_ratio, brush->gpencil_settings->aspect_ratio);
   gps->inittime = 0.0f;
 
diff --git a/source/blender/editors/gpencil_legacy/gpencil_paint.cc b/source/blender/editors/gpencil_legacy/gpencil_paint.cc
index 66798ebeeaf..a7685b5b6db 100644
--- a/source/blender/editors/gpencil_legacy/gpencil_paint.cc
+++ b/source/blender/editors/gpencil_legacy/gpencil_paint.cc
@@ -1052,7 +1052,7 @@ static void gpencil_stroke_newfrombuffer(tGPsdata *p)
   gps->totpoints = totelem;
   gps->thickness = brush->size;
   gps->fill_opacity_fac = 1.0f;
-  gps->hardeness = brush->gpencil_settings->hardeness;
+  gps->hardness = brush->gpencil_settings->hardness;
   copy_v2_v2(gps->aspect_ratio, brush->gpencil_settings->aspect_ratio);
   gps->flag = gpd->runtime.sbuffer_sflag;
   gps->inittime = p->inittime;
diff --git a/source/blender/editors/gpencil_legacy/gpencil_primitive.cc b/source/blender/editors/gpencil_legacy/gpencil_primitive.cc
index 4447d74a376..4ca7f30fda2 100644
--- a/source/blender/editors/gpencil_legacy/gpencil_primitive.cc
+++ b/source/blender/editors/gpencil_legacy/gpencil_primitive.cc
@@ -322,7 +322,7 @@ static void gpencil_primitive_set_initdata(bContext *C, tGPDprimitive *tgpi)
   bGPDstroke *gps = static_cast<bGPDstroke *>(MEM_callocN(sizeof(bGPDstroke), "Temp bGPDstroke"));
   gps->thickness = 2.0f;
   gps->fill_opacity_fac = 1.0f;
-  gps->hardeness = 1.0f;
+  gps->hardness = 1.0f;
   copy_v2_fl(gps->aspect_ratio, 1.0f);
   gps->uv_scale = 1.0f;
   gps->inittime = 0.0f;
@@ -1349,7 +1349,7 @@ static void gpencil_primitive_interaction_end(bContext *C,
   gps = static_cast<bGPDstroke *>(tgpi->gpf->strokes.first);
   if (gps) {
     gps->thickness = brush->size;
-    gps->hardeness = brush_settings->hardeness;
+    gps->hardness = brush_settings->hardness;
     copy_v2_v2(gps->aspect_ratio, brush_settings->aspect_ratio);
 
     /* Calc geometry data. */
diff --git a/source/blender/editors/space_view3d/view3d_gizmo_ruler.cc b/source/blender/editors/space_view3d/view3d_gizmo_ruler.cc
index 0da2c1a9ece..a4ed2e54b32 100644
--- a/source/blender/editors/space_view3d/view3d_gizmo_ruler.cc
+++ b/source/blender/editors/space_view3d/view3d_gizmo_ruler.cc
@@ -568,7 +568,7 @@ static bool view3d_ruler_to_gpencil(bContext *C, wmGizmoGroup *gzgroup)
     }
     gps->flag = GP_STROKE_3DSPACE;
     gps->thickness = 3;
-    gps->hardeness = 1.0f;
+    gps->hardness = 1.0f;
     gps->fill_opacity_fac = 1.0f;
     copy_v2_fl(gps->aspect_ratio, 1.0f);
     gps->uv_scale = 1.0f;
diff --git a/source/blender/gpencil_modifiers_legacy/intern/MOD_gpencil_legacy_opacity.cc b/source/blender/gpencil_modifiers_legacy/intern/MOD_gpencil_legacy_opacity.cc
index fab25b06bc6..e11348e5749 100644
--- a/source/blender/gpencil_modifiers_legacy/intern/MOD_gpencil_legacy_opacity.cc
+++ b/source/blender/gpencil_modifiers_legacy/intern/MOD_gpencil_legacy_opacity.cc
@@ -100,8 +100,8 @@ static void deform_stroke(GpencilModifierData *md,
 
   /* Hardness (at stroke level). */
   if (mmd->modify_color == GP_MODIFY_COLOR_HARDNESS) {
-    gps->hardeness *= mmd->hardeness;
-    CLAMP(gps->hardeness, 0.0f, 1.0f);
+    gps->hardness *= mmd->hardness;
+    CLAMP(gps->hardness, 0.0f, 1.0f);
 
     return;
   }
diff --git a/source/blender/makesdna/DNA_brush_types.h b/source/blender/makesdna/DNA_brush_types.h
index 2507d66dd0a..2ebb9e8fcf8 100644
--- a/source/blender/makesdna/DNA_brush_types.h
+++ b/source/blender/makesdna/DNA_brush_types.h
@@ -90,7 +90,7 @@ typedef struct BrushGpencilSettings {
   int flag;
 
   /** gradient control along y for color */
-  float hardeness;
+  float hardness;
   /** factor xy of shape for dots gradients */
   float aspect_ratio[2];
   /** Simplify adaptive factor */
diff --git a/source/blender/makesdna/DNA_gpencil_legacy_types.h b/source/blender/makesdna/DNA_gpencil_legacy_types.h
index 5ac6b08f11b..5002ef36e5c 100644
--- a/source/blender/makesdna/DNA_gpencil_legacy_types.h
+++ b/source/blender/makesdna/DNA_gpencil_legacy_types.h
@@ -290,7 +290,7 @@ typedef struct bGPDstroke {
   short caps[2];
 
   /** gradient control along y for color */
-  float hardeness;
+  float hardness;
   /** factor xy of shape for dots gradients */
   float aspect_ratio[2];
 
diff --git a/source/blender/makesdna/DNA_gpencil_modifier_defaults.h b/source/blender/makesdna/DNA_gpencil_modifier_defaults.h
index adfbaf86c4c..ac8d34be803 100644
--- a/source/blender/makesdna/DNA_gpencil_modifier_defaults.h
+++ b/source/blender/makesdna/DNA_gpencil_modifier_defaults.h
@@ -176,7 +176,7 @@
     .factor = 1.0f, \
     .modify_color = GP_MODIFY_COLOR_BOTH, \
     .layer_pass = 0, \
-    .hardeness = 1.0f, \
+    .hardness = 1.0f, \
     .curve_intensity = NULL, \
   }
 
diff --git a/source/blender/makesdna/DNA_gpencil_modifier_types.h b/source/blender/makesdna/DNA_gpencil_modifier_types.h
index 3e8f6ba53eb..3907688fd55 100644
--- a/source/blender/makesdna/DNA_gpencil_modifier_types.h
+++ b/source/blender/makesdna/DNA_gpencil_modifier_types.h
@@ -320,7 +320,7 @@ typedef struct OpacityGpencilModifierData {
   /** Custom index for passes. */
   int layer_pass;
 
-  float hardeness;
+  float hardness;
   struct CurveMapping *curve_intensity;
 } OpacityGpencilModifierData;
 
diff --git a/source/blender/makesdna/intern/dna_rename_defs.h b/source/blender/makesdna/intern/dna_rename_defs.h
index a27b9d5f666..1574152a5b2 100644
--- a/source/blender/makesdna/intern/dna_rename_defs.h
+++ b/source/blender/makesdna/intern/dna_rename_defs.h
@@ -52,7 +52,7 @@ DNA_STRUCT_RENAME_ELEM(Bone, scaleIn, scale_in_x)
 DNA_STRUCT_RENAME_ELEM(Bone, scaleOut, scale_out_x)
 DNA_STRUCT_RENAME_ELEM(Bone, scale_in_y, scale_in_z)
 DNA_STRUCT_RENAME_ELEM(Bone, scale_out_y, scale_out_z)
-DNA_STRUCT_RENAME_ELEM(BrushGpencilSettings, gradient_f, hardeness)
+DNA_STRUCT_RENAME_ELEM(BrushGpencilSettings, gradient_f, hardness)
 DNA_STRUCT_RENAME_ELEM(BrushGpencilSettings, gradient_s, aspect_ratio)
 DNA_STRUCT_RENAME_ELEM(Camera, YF_dofdist, dof_distance)
 DNA_STRUCT_RENAME_ELEM(Camera, clipend, clip_end)
@@ -143,6 +143,7 @@ DNA_STRUCT_RENAME_ELEM(Object, obmat, object_to_world)
 DNA_STRUCT_RENAME_ELEM(Object, restrictflag, visibility_flag)
 DNA_STRUCT_RENAME_ELEM(Object, size, scale)
 DNA_STRUCT_RENAME_ELEM(Object_Runtime, crazyspace_num_verts, crazyspace_verts_num)
+DNA_STRUCT_RENAME_ELEM(OpacityGpencilModifierData, hardeness, hardness)
 DNA_STRUCT_RENAME_ELEM(ParticleSettings, child_nbr, child_percent)
 DNA_STRUCT_RENAME_ELEM(ParticleSettings, dup_group, instance_collection)
 DNA_STRUCT_RENAME_ELEM(ParticleSettings, dup_ob, instance_object)
@@ -173,7 +174,7 @@ DNA_STRUCT_RENAME_ELEM(View3D, near, clip_start)
 DNA_STRUCT_RENAME_ELEM(View3D, ob_centre, ob_center)
 DNA_STRUCT_RENAME_ELEM(View3D, ob_centre_bone, ob_center_bone)
 DNA_STRUCT_RENAME_ELEM(View3D, ob_centre_cursor, ob_center_cursor)
-DNA_STRUCT_RENAME_ELEM(bGPDstroke, gradient_f, hardeness)
+DNA_STRUCT_RENAME_ELEM(bGPDstroke, gradient_f, hardness)
 DNA_STRUCT_RENAME_ELEM(bGPDstroke, gradient_s, aspect_ratio)
 DNA_STRUCT_RENAME_ELEM(bNodeTree, inputs, inputs_legacy)
 DNA_STRUCT_RENAME_ELEM(bNodeTree, outputs, outputs_legacy)
@@ -205,7 +206,6 @@ DNA_STRUCT_RENAME_ELEM(bTheme, ttopbar, space_topbar)
 DNA_STRUCT_RENAME_ELEM(bTheme, tuserpref, space_preferences)
 DNA_STRUCT_RENAME_ELEM(bTheme, tv3d, space_view3d)
 DNA_STRUCT_RENAME_ELEM(bUserAssetLibrary, path, dirpath)
-
 /* NOTE: Keep sorted! */
 
 /* Write with a different name, old Blender versions crash loading files with non-NULL
diff --git a/source/blender/makesrna/intern/rna_brush.cc b/source/blender/makesrna/intern/rna_brush.cc
index b4787a0606c..3bb64f8c779 100644
--- a/source/blender/makesrna/intern/rna_brush.cc
+++ b/source/blender/makesrna/intern/rna_brush.cc
@@ -1647,7 +1647,7 @@ static void rna_def_gpencil_options(BlenderRNA *brna)
 
   /* gradient control */
   prop = RNA_def_property(srna, "hardness", PROP_FLOAT, PROP_FACTOR);
-  RNA_def_property_float_sdna(prop, nullptr, "hardeness");
+  RNA_def_property_float_sdna(prop, nullptr, "hardness");
   RNA_def_property_range(prop, 0.001f, 1.0f);
   RNA_def_property_float_default(prop, 1.0f);
   RNA_def_property_ui_text(
diff --git a/source/blender/makesrna/intern/rna_gpencil_legacy.cc b/source/blender/makesrna/intern/rna_gpencil_legacy.cc
index d85fc10a0f7..15d8e6b6100 100644
--- a/source/blender/makesrna/intern/rna_gpencil_legacy.cc
+++ b/source/blender/makesrna/intern/rna_gpencil_legacy.cc
@@ -1700,7 +1700,7 @@ static void rna_def_gpencil_stroke(BlenderRNA *brna)
 
   /* gradient control along y */
   prop = RNA_def_property(srna, "hardness", PROP_FLOAT, PROP_FACTOR);
-  RNA_def_property_float_sdna(prop, nullptr, "hardeness");
+  RNA_def_property_float_sdna(prop, nullptr, "hardness");
   RNA_def_property_range(prop, 0.001f, 1.0f);
   RNA_def_property_float_default(prop, 1.0f);
   RNA_def_property_ui_text(prop, "Hardness", "Amount of gradient along section of stroke");
diff --git a/source/blender/makesrna/intern/rna_gpencil_legacy_modifier.cc b/source/blender/makesrna/intern/rna_gpencil_legacy_modifier.cc
index 0574a6f69c1..bafa4d38ca2 100644
--- a/source/blender/makesrna/intern/rna_gpencil_legacy_modifier.cc
+++ b/source/blender/makesrna/intern/rna_gpencil_legacy_modifier.cc
@@ -2136,7 +2136,7 @@ static void rna_def_modifier_gpencilopacity(BlenderRNA *brna)
   RNA_def_property_update(prop, 0, "rna_GpencilModifier_update");
 
   prop = RNA_def_property(srna, "hardness", PROP_FLOAT, PROP_NONE);
-  RNA_def_property_float_sdna(prop, nullptr, "hardeness");
+  RNA_def_property_float_sdna(prop, nullptr, "hardness");
   RNA_def_property_range(prop, 0.0, FLT_MAX);
   RNA_def_property_ui_range(prop, 0.0, FLT_MAX, 0.1, 2);
   RNA_def_property_ui_text(prop, "Hardness", "Factor of stroke hardness");