Index: clang-tidy/objc/PropertyDeclarationCheck.h
===================================================================
--- clang-tidy/objc/PropertyDeclarationCheck.h
+++ clang-tidy/objc/PropertyDeclarationCheck.h
@@ -35,6 +35,7 @@
 
 private:
     const std::vector<std::string> SpecialAcronyms;
+    const std::vector<std::string> AdditionalAcronyms;
 };
 
 } // namespace objc
Index: clang-tidy/objc/PropertyDeclarationCheck.cpp
===================================================================
--- clang-tidy/objc/PropertyDeclarationCheck.cpp
+++ clang-tidy/objc/PropertyDeclarationCheck.cpp
@@ -124,14 +124,22 @@
                                                    ClangTidyContext *Context)
     : ClangTidyCheck(Name, Context),
       SpecialAcronyms(utils::options::parseStringList(
-          Options.get("Acronyms", DefaultSpecialAcronyms))) {}
+          Options.get("Acronyms", DefaultSpecialAcronyms))),
+      AdditionalAcronyms(utils::options::parseStringList(
+          Options.get("AdditionalAcronyms", ""))) {}
 
 void PropertyDeclarationCheck::registerMatchers(MatchFinder *Finder) {
+  std::vector<std::string> Acronyms;
+  Acronyms.reserve(SpecialAcronyms.size() + AdditionalAcronyms.size());
+  Acronyms.insert(Acronyms.end(), SpecialAcronyms.begin(),
+                  SpecialAcronyms.end());
+  Acronyms.insert(Acronyms.end(), AdditionalAcronyms.begin(),
+                  AdditionalAcronyms.end());
   Finder->addMatcher(
       objcPropertyDecl(
           // the property name should be in Lower Camel Case like
           // 'lowerCamelCase'
-          unless(matchesName(validPropertyNameRegex(SpecialAcronyms))))
+          unless(matchesName(validPropertyNameRegex(Acronyms))))
           .bind("property"),
       this);
 }
@@ -149,6 +157,8 @@
 void PropertyDeclarationCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
   Options.store(Opts, "Acronyms",
                 utils::options::serializeStringList(SpecialAcronyms));
+  Options.store(Opts, "AdditionalAcronyms",
+                utils::options::serializeStringList(AdditionalAcronyms));
 }
 
 }  // namespace objc
Index: docs/clang-tidy/checks/objc-property-declaration.rst
===================================================================
--- docs/clang-tidy/checks/objc-property-declaration.rst
+++ docs/clang-tidy/checks/objc-property-declaration.rst
@@ -41,3 +41,12 @@
    or a suffix of property names.
 
    If unset, defaults to "ACL;API;ARGB;ASCII;BGRA;CMYK;DNS;FPS;FTP;GIF;GPS;HD;HDR;HTML;HTTP;HTTPS;HUD;ID;JPG;JS;LAN;LZW;MDNS;MIDI;OS;PDF;PIN;PNG;POI;PSTN;PTR;QA;QOS;RGB;RGBA;RGBX;ROM;RPC;RTF;RTL;SDK;SSO;TCP;TIFF;TTS;UI;URI;URL;VC;VOIP;VPN;VR;WAN;XML".
+
+   If set, replaces the default list. (If you want to append to the default list, set AdditionalAcronyms instead.)
+
+.. option:: AdditionalAcronyms
+
+   Semicolon-separated list of additional acronyms that can be used as a prefix
+   or a suffix of property names.
+
+   Appends to the list in Acronyms.
Index: test/clang-tidy/objc-property-declaration-additional.m
===================================================================
--- test/clang-tidy/objc-property-declaration-additional.m
+++ test/clang-tidy/objc-property-declaration-additional.m
@@ -1,6 +1,6 @@
 // RUN: %check_clang_tidy %s objc-property-declaration %t \
 // RUN: -config='{CheckOptions: \
-// RUN:  [{key: objc-property-declaration.Acronyms, value: "ABC;TGIF"}]}' \
+// RUN:  [{key: objc-property-declaration.AdditionalAcronyms, value: "ABC;TGIF"}]}' \
 // RUN: --
 @class NSString;
 
@@ -11,4 +11,5 @@
 @property(assign, nonatomic) int ABCCustomPrefix;
 @property(strong, nonatomic) NSString *ABC_custom_prefix;
 // CHECK-MESSAGES: :[[@LINE-1]]:40: warning: property name 'ABC_custom_prefix' should use lowerCamelCase style, according to the Apple Coding Guidelines [objc-property-declaration]
+@property(assign, nonatomic) int GIFShouldIncludeStandardAcronym;
 @end
Index: test/clang-tidy/objc-property-declaration-custom.m
===================================================================
--- test/clang-tidy/objc-property-declaration-custom.m
+++ test/clang-tidy/objc-property-declaration-custom.m
@@ -11,4 +11,6 @@
 @property(assign, nonatomic) int ABCCustomPrefix;
 @property(strong, nonatomic) NSString *ABC_custom_prefix;
 // CHECK-MESSAGES: :[[@LINE-1]]:40: warning: property name 'ABC_custom_prefix' should use lowerCamelCase style, according to the Apple Coding Guidelines [objc-property-declaration]
+@property(assign, nonatomic) int GIFIgnoreStandardAcronym;
+// CHECK-MESSAGES: :[[@LINE-1]]:34: warning: property name 'GIFIgnoreStandardAcronym' should use lowerCamelCase style, according to the Apple Coding Guidelines [objc-property-declaration]
 @end