Index: clang-tidy/readability/InconsistentDeclarationParameterNameCheck.cpp
===================================================================
--- clang-tidy/readability/InconsistentDeclarationParameterNameCheck.cpp
+++ clang-tidy/readability/InconsistentDeclarationParameterNameCheck.cpp
@@ -90,6 +90,12 @@
   return true;
 }
 
+// We allow two names if one is a substring of the other, ignoring case.
+// Important special case: this is true if either parameter has no name!
+bool nameMatch(StringRef L, StringRef R) {
+  return L.contains_lower(R) || R.contains_lower(L);
+}
+
 DifferingParamsContainer
 findDifferingParamsInDeclaration(const FunctionDecl *ParameterSourceDeclaration,
                                  const FunctionDecl *OtherDeclaration,
@@ -106,8 +112,7 @@
 
     // FIXME: Provide a way to extract commented out parameter name from comment
     // next to it.
-    if (!SourceParamName.empty() && !OtherParamName.empty() &&
-        SourceParamName != OtherParamName) {
+    if (!nameMatch(SourceParamName, OtherParamName)) {
       SourceRange OtherParamNameRange =
           DeclarationNameInfo((*OtherParamIt)->getDeclName(),
                               (*OtherParamIt)->getLocation())
Index: test/clang-tidy/readability-inconsistent-declaration-parameter-name.cpp
===================================================================
--- test/clang-tidy/readability-inconsistent-declaration-parameter-name.cpp
+++ test/clang-tidy/readability-inconsistent-declaration-parameter-name.cpp
@@ -2,6 +2,8 @@
 
 void consistentFunction(int a, int b, int c);
 void consistentFunction(int a, int b, int c);
+void consistentFunction(int prefixA, int inBFix, int cSuffix);
+void consistentFunction(int a, int b, int c);
 void consistentFunction(int a, int b, int /*c*/);
 void consistentFunction(int /*c*/, int /*c*/, int /*c*/);