diff --git a/clang-tools-extra/clang-tidy/utils/RenamerClangTidyCheck.cpp b/clang-tools-extra/clang-tidy/utils/RenamerClangTidyCheck.cpp
index da1433aa2d05d..69b7d40ef628d 100644
--- a/clang-tools-extra/clang-tidy/utils/RenamerClangTidyCheck.cpp
+++ b/clang-tools-extra/clang-tidy/utils/RenamerClangTidyCheck.cpp
@@ -31,13 +31,12 @@ struct DenseMapInfo<clang::tidy::RenamerClangTidyCheck::NamingCheckId> {
   using NamingCheckId = clang::tidy::RenamerClangTidyCheck::NamingCheckId;
 
   static inline NamingCheckId getEmptyKey() {
-    return {DenseMapInfo<clang::SourceLocation>::getEmptyKey(),
-                         "EMPTY"};
+    return {DenseMapInfo<clang::SourceLocation>::getEmptyKey(), "EMPTY"};
   }
 
   static inline NamingCheckId getTombstoneKey() {
     return {DenseMapInfo<clang::SourceLocation>::getTombstoneKey(),
-                         "TOMBSTONE"};
+            "TOMBSTONE"};
   }
 
   static unsigned getHashValue(NamingCheckId Val) {
@@ -367,6 +366,23 @@ class RenamerClangTidyVisitor
     return true;
   }
 
+  bool VisitDesignatedInitExpr(DesignatedInitExpr *Expr) {
+    for (const DesignatedInitExpr::Designator &D : Expr->designators()) {
+      if (!D.isFieldDesignator())
+        continue;
+      const FieldDecl *FD = D.getFieldDecl();
+      if (!FD)
+        continue;
+      const IdentifierInfo *II = FD->getIdentifier();
+      if (!II)
+        continue;
+      SourceRange FixLocation{D.getFieldLoc(), D.getFieldLoc()};
+      Check->addUsage(FD, FixLocation, SM);
+    }
+
+    return true;
+  }
+
 private:
   RenamerClangTidyCheck *Check;
   const SourceManager *SM;
diff --git a/clang-tools-extra/docs/ReleaseNotes.rst b/clang-tools-extra/docs/ReleaseNotes.rst
index 2babb1406b977..bdd53f06e7e2f 100644
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -266,7 +266,8 @@ Changes in existing checks
 - Improved :doc:`readability-identifier-naming
   <clang-tidy/checks/readability/identifier-naming>` check in `GetConfigPerFile`
   mode by resolving symbolic links to header files. Fixed handling of Hungarian
-  Prefix when configured to `LowerCase`.
+  Prefix when configured to `LowerCase`. Added support for renaming designated
+  initializers.
 
 - Improved :doc:`readability-implicit-bool-conversion
   <clang-tidy/checks/readability/implicit-bool-conversion>` check to provide
diff --git a/clang-tools-extra/test/clang-tidy/checkers/readability/identifier-naming.cpp b/clang-tools-extra/test/clang-tidy/checkers/readability/identifier-naming.cpp
index d2e89a7c9855c..57ef4aae5ddb7 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/readability/identifier-naming.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/readability/identifier-naming.cpp
@@ -766,3 +766,13 @@ STATIC_MACRO void someFunc(MyFunPtr, const MyFunPtr****) {}
 // CHECK-FIXES: {{^}}STATIC_MACRO void someFunc(my_fun_ptr_t, const my_fun_ptr_t****) {}
 #undef STATIC_MACRO
 }
+
+struct Some_struct {
+  int SomeMember;
+// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: invalid case style for public member 'SomeMember' [readability-identifier-naming]
+// CHECK-FIXES: {{^}}  int some_member;
+};
+Some_struct g_s1{ .SomeMember = 1 };
+// CHECK-FIXES: {{^}}Some_struct g_s1{ .some_member = 1 };
+Some_struct g_s2{.SomeMember=1};
+// CHECK-FIXES: {{^}}Some_struct g_s2{.some_member=1};