diff --git a/clang-tools-extra/clang-tidy/utils/RenamerClangTidyCheck.cpp b/clang-tools-extra/clang-tidy/utils/RenamerClangTidyCheck.cpp
index dd28806e008ed..eaa04fef08c43 100644
--- a/clang-tools-extra/clang-tidy/utils/RenamerClangTidyCheck.cpp
+++ b/clang-tools-extra/clang-tidy/utils/RenamerClangTidyCheck.cpp
@@ -432,6 +432,10 @@ RenamerClangTidyCheck::addUsage(
   if (FixLocation.isInvalid())
     return {NamingCheckFailures.end(), false};
 
+  // Skip if in system system header
+  if (SourceMgr.isInSystemHeader(FixLocation))
+    return {NamingCheckFailures.end(), false};
+
   auto EmplaceResult = NamingCheckFailures.try_emplace(FailureId);
   NamingCheckFailure &Failure = EmplaceResult.first->second;
 
@@ -455,6 +459,9 @@ RenamerClangTidyCheck::addUsage(
 void RenamerClangTidyCheck::addUsage(const NamedDecl *Decl,
                                      SourceRange UsageRange,
                                      const SourceManager &SourceMgr) {
+  if (SourceMgr.isInSystemHeader(Decl->getLocation()))
+    return;
+
   if (hasNoName(Decl))
     return;
 
diff --git a/clang-tools-extra/docs/ReleaseNotes.rst b/clang-tools-extra/docs/ReleaseNotes.rst
index e45f870fd4330..2f720d47a0931 100644
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -130,6 +130,10 @@ Changes in existing checks
   <clang-tidy/checks/bugprone/infinite-loop>` check by adding detection for
   variables introduced by structured bindings.
 
+- Improved :doc:`bugprone-reserved-identifier
+  <clang-tidy/checks/bugprone/reserved-identifier>` check by ignoring
+  declarations in system headers.
+
 - Improved :doc:`bugprone-signed-char-misuse
   <clang-tidy/checks/bugprone/signed-char-misuse>` check by fixing
   false positives on C23 enums with the fixed underlying type of signed char.
@@ -160,6 +164,10 @@ Changes in existing checks
   <clang-tidy/checks/portability/template-virtual-member-function>` check to
   avoid false positives on pure virtual member functions.
 
+- Improved :doc:`readability-identifier-naming
+  <clang-tidy/checks/readability/identifier-naming>` check by ignoring
+  declarations in system headers.
+
 - Improved :doc:`readability-qualified-auto
   <clang-tidy/checks/readability/qualified-auto>` check by adding the option
   `IgnoreAliasing`, that allows not looking at underlying types of type aliases.