diff --git a/Ghidra/Features/GnuDemangler/data/default.gnu.demangler.replacements.txt b/Ghidra/Features/GnuDemangler/data/default.gnu.demangler.replacements.txt
index c14eb6d242..96b23f3d81 100644
--- a/Ghidra/Features/GnuDemangler/data/default.gnu.demangler.replacements.txt
+++ b/Ghidra/Features/GnuDemangler/data/default.gnu.demangler.replacements.txt
@@ -28,14 +28,14 @@
 //
 
 // 
-// Note: these have been disabled.  Some binaries have a class namespace with the same name in more
-// than one namespace that may include these values.  In that case, if we drop these values, then
-// instead of 2 distinct namespaces, we will have only 1, which is incorrect.  If we decide that
+// Note: some of these have been disabled.  Some binaries have a class namespace with the same name
+// in more than one namespace that may include these values.  In that case, if we drop these values,
+// then instead of 2 distinct namespaces, we will have only 1, which is incorrect.  If we decide that
 // these values are not desired, then we will have to figure out a way to create 2 distinct 
 // namespaces after we apply the simplification.
 // 
 // current tests show this is a non-leading mangled namespace placeholder
-//""		::__1
+""		::__1
 
 // current tests show this is a non-leading mangled namespace placeholder
 //""		::__cxx11
diff --git a/Ghidra/Features/GnuDemangler/src/main/java/ghidra/app/util/demangler/gnu/GnuDemanglerParser.java b/Ghidra/Features/GnuDemangler/src/main/java/ghidra/app/util/demangler/gnu/GnuDemanglerParser.java
index bdc59032e7..5af4da0d8a 100644
--- a/Ghidra/Features/GnuDemangler/src/main/java/ghidra/app/util/demangler/gnu/GnuDemanglerParser.java
+++ b/Ghidra/Features/GnuDemangler/src/main/java/ghidra/app/util/demangler/gnu/GnuDemanglerParser.java
@@ -1550,17 +1550,16 @@ public class GnuDemanglerParser {
 		for (ResourceFile file : files) {
 			List<String> lines = getReplacementLines(file);
 			for (String line : lines) {
-				GnuDemanglerReplacement replacement = parseReplacement(line, file);
-				if (replacement != null) {
-					results.add(replacement);
-				}
+				parseReplacement(line, file, results);
 			}
 		}
 
 		return results;
 	}
 
-	private static GnuDemanglerReplacement parseReplacement(String line, ResourceFile file) {
+	private static void parseReplacement(String line, ResourceFile file,
+			List<GnuDemanglerReplacement> results) {
+
 		for (int i = 0; i < line.length(); i++) {
 			char c = line.charAt(i);
 			if (Character.isWhitespace(c)) {
@@ -1572,13 +1571,35 @@ public class GnuDemanglerParser {
 				}
 
 				String find = line.substring(i).trim();
-				return new GnuDemanglerReplacement(find, replace, file);
+				results.add(new GnuDemanglerReplacement(find, replace, file));
+
+				// 
+				// We have disabled some global text replacements.  Instead of globally replacing
+				// them, we will update each replacement to handle the special case when it starts
+				// at the beginning of the replacement.
+				//
+				createAlternateReplacement("std::__cxx11::", find, replace, file, results);
+				createAlternateReplacement("__gnu_cxx::", find, replace, file, results);
+
+				return;
 			}
 		}
 
 		Msg.warn(GnuDemanglerParser.class,
 			"Malformed replacement line.  No spaces found: " + line + ". In file: " + file);
-		return null;
+	}
+
+	private static void createAlternateReplacement(String alternate, String find, String replace,
+			ResourceFile file, List<GnuDemanglerReplacement> results) {
+
+		if (!(find.startsWith("std::") && replace.startsWith("std::"))) {
+			return;
+		}
+
+		String altFind = find.replaceFirst("std::", alternate);
+		String altReplace = replace.replaceFirst("std::", alternate);
+		results.add(new GnuDemanglerReplacement(altFind, altReplace, file));
+
 	}
 
 	private static List<String> getReplacementLines(ResourceFile file) {
diff --git a/Ghidra/Features/GnuDemangler/src/test/java/ghidra/app/util/demangler/GnuDemanglerParserTest.java b/Ghidra/Features/GnuDemangler/src/test/java/ghidra/app/util/demangler/GnuDemanglerParserTest.java
index 1dae049b18..5974df1858 100644
--- a/Ghidra/Features/GnuDemangler/src/test/java/ghidra/app/util/demangler/GnuDemanglerParserTest.java
+++ b/Ghidra/Features/GnuDemangler/src/test/java/ghidra/app/util/demangler/GnuDemanglerParserTest.java
@@ -197,15 +197,15 @@ public class GnuDemanglerParserTest extends AbstractGenericTest {
 		List<DemangledParameter> parameters = function.getParameters();
 
 		assertEquals(
-			"__insertion_sort<__normal_iterator<std::pair<unsigned_long,PcodeOp*>*,std::vector<std::pair<unsigned_long,PcodeOp*>,std::allocator<std::pair<unsigned_long,PcodeOp*>>>>,bool(*)(std::pair<unsigned_long,PcodeOp*>const&,std::pair<unsigned_long,PcodeOp*>const&)>",
+			"__insertion_sort<__gnu_cxx::__normal_iterator<std::pair<unsigned_long,PcodeOp*>*,std::vector<std::pair<unsigned_long,PcodeOp*>,std::allocator<std::pair<unsigned_long,PcodeOp*>>>>,bool(*)(std::pair<unsigned_long,PcodeOp*>const&,std::pair<unsigned_long,PcodeOp*>const&)>",
 			function.getName());
 		assertEquals("std", function.getNamespace().getName());
 
 		assertEquals(
-			"__normal_iterator<std::pair<unsigned long,PcodeOp *> *,std::vector<std::pair<unsigned long,PcodeOp *>,std::allocator<std::pair<unsigned long,PcodeOp *>>>>",
+			"__gnu_cxx::__normal_iterator<std::pair<unsigned long,PcodeOp *> *,std::vector<std::pair<unsigned long,PcodeOp *>,std::allocator<std::pair<unsigned long,PcodeOp *>>>>",
 			parameters.get(0).toString());
 		assertEquals(
-			"__normal_iterator<std::pair<unsigned long,PcodeOp *> *,std::vector<std::pair<unsigned long,PcodeOp *>,std::allocator<std::pair<unsigned long,PcodeOp *>>>>",
+			"__gnu_cxx::__normal_iterator<std::pair<unsigned long,PcodeOp *> *,std::vector<std::pair<unsigned long,PcodeOp *>,std::allocator<std::pair<unsigned long,PcodeOp *>>>>",
 			parameters.get(1).toString());
 		assertEquals(
 			"bool (*)(std::pair<unsigned long,PcodeOp *> const &,std::pair<unsigned long,PcodeOp *> const &)",
@@ -1112,7 +1112,7 @@ public class GnuDemanglerParserTest extends AbstractGenericTest {
 
 		String signature = object.getSignature(false);
 		assertEquals(
-			"std::string std::_Bind<std::string(EduAppConfigs::*(EduAppConfigs_const*))()const>::operator()<missing_argument,std::string>(void)",
+			"std::__cxx11::string std::_Bind<std::__cxx11::string(EduAppConfigs::*(EduAppConfigs_const*))()const>::operator()<missing_argument,std::__cxx11::string>(void)",
 			signature);
 	}
 
@@ -1145,7 +1145,7 @@ public class GnuDemanglerParserTest extends AbstractGenericTest {
 
 		String signature = object.getSignature(false);
 		assertEquals(
-			"std::string gsl::to_string<char_const,-1l>(gsl::basic_string_span<char const,long>)",
+			"std::__cxx11::string gsl::to_string<char_const,-1l>(gsl::basic_string_span<char const,long>)",
 			signature);
 	}
 
@@ -1630,7 +1630,7 @@ public class GnuDemanglerParserTest extends AbstractGenericTest {
 			"vector<boost::function<void()>,std::allocator<boost::function<void()>>>");
 
 		assertEquals(
-			"undefined std::vector<boost::function<void()>,std::allocator<boost::function<void()>>>::_M_insert_aux(__normal_iterator<boost::function<void ()> *,std::vector<boost::function<void ()>,std::allocator<boost::function<void ()>>>>,boost::function<void ()> const &)",
+			"undefined std::vector<boost::function<void()>,std::allocator<boost::function<void()>>>::_M_insert_aux(__gnu_cxx::__normal_iterator<boost::function<void ()> *,std::vector<boost::function<void ()>,std::allocator<boost::function<void ()>>>>,boost::function<void ()> const &)",
 			object.getSignature(false));
 	}
 
@@ -1770,7 +1770,7 @@ public class GnuDemanglerParserTest extends AbstractGenericTest {
 
 		String signature = object.getSignature(false);
 		assertEquals("undefined " +
-			"__stoa<long,int,char,int>(long(*)(char_const*,char**,int),char_const*,char_const*,unsigned_long*,int)" +
+			"__gnu_cxx::__stoa<long,int,char,int>(long(*)(char_const*,char**,int),char_const*,char_const*,unsigned_long*,int)" +
 			"::_Save_errno::_Save_errno(void)", signature);
 	}
 
diff --git a/Ghidra/Features/GnuDemangler/src/test/java/ghidra/app/util/demangler/gnu/GnuDemanglerTest.java b/Ghidra/Features/GnuDemangler/src/test/java/ghidra/app/util/demangler/gnu/GnuDemanglerTest.java
index d879f51270..2214781c7c 100644
--- a/Ghidra/Features/GnuDemangler/src/test/java/ghidra/app/util/demangler/gnu/GnuDemanglerTest.java
+++ b/Ghidra/Features/GnuDemangler/src/test/java/ghidra/app/util/demangler/gnu/GnuDemanglerTest.java
@@ -154,14 +154,14 @@ public class GnuDemanglerTest extends AbstractGenericTest {
 		assertNotNull(dobj);
 
 		String signature = dobj.getSignature();
-		assertEquals("undefined Greeter::greet(std::string)", signature);
+		assertEquals("undefined Greeter::greet(std::__cxx11::string)", signature);
 
 		DemangledParameter demangledParameter = dobj.getParameters().get(0);
 		DemangledDataType type = demangledParameter.getType();
 		DataType dt = type.getDataType(program.getDataTypeManager());
 		assertTrue(dt.isNotYetDefined());
 		//@formatter:off
-		assertEquals("/Demangler/std/string\n" + 
+		assertEquals("/Demangler/std/__cxx11/string\n" + 
 			"pack(disabled)\n" + 
 			"Structure string {\n" + 
 			"}\n" +