diff --git a/lldb/source/Plugins/SymbolFile/DWARF/ManualDWARFIndex.cpp b/lldb/source/Plugins/SymbolFile/DWARF/ManualDWARFIndex.cpp
--- a/lldb/source/Plugins/SymbolFile/DWARF/ManualDWARFIndex.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/ManualDWARFIndex.cpp
@@ -464,6 +464,17 @@
     if (!m_set.function_methods.Find(
             name, DIERefCallback(callback, name.GetStringRef())))
       return;
+    // With -gsimple-template-names, the die name may not contain template
+    // parameters. Try stripping the template parameters and try again.
+    const llvm::StringRef name_ref = name.AsCString();
+    auto it = name_ref.find('<');
+    if (it != llvm::StringRef::npos) {
+      const llvm::StringRef name_no_template_params = name_ref.slice(0, it);
+      if (!m_set.function_methods.Find(
+              ConstString(name_no_template_params),
+              DIERefCallback(callback, name_no_template_params)))
+        return;
+    }
   }
 
   if (name_type_mask & eFunctionNameTypeSelector &&
diff --git a/lldb/test/API/functionalities/breakpoint/cpp/TestCPPBreakpointLocations.py b/lldb/test/API/functionalities/breakpoint/cpp/TestCPPBreakpointLocations.py
--- a/lldb/test/API/functionalities/breakpoint/cpp/TestCPPBreakpointLocations.py
+++ b/lldb/test/API/functionalities/breakpoint/cpp/TestCPPBreakpointLocations.py
@@ -12,7 +12,16 @@
 
     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24764")
     def test(self):
-        self.build()
+        self.do_test(dict())
+
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24764")
+    @skipIf(compiler=no_match("clang"))
+    @skipIf(compiler_version=["<", "15.0"])
+    def test_simple_template_names(self):
+        self.do_test(dict(CFLAGS_EXTRAS="-gsimple-template-names"))
+
+    def do_test(self, debug_flags):
+        self.build(dictionary=debug_flags)
         self.breakpoint_id_tests()
 
     def verify_breakpoint_locations(self, target, bp_dict):
@@ -57,7 +66,11 @@
 
             # Template cases
             {'name': 'func<float>', 'loc_names': []},
+            {'name': 'Foo::func<float>', 'loc_names': []},
+            {'name': 'ns::Foo::func<float>', 'loc_names': []},
             {'name': 'func<int>', 'loc_names': ['auto ns::Foo<double>::func<int>()']},
+            {'name': 'Foo<double>::func<int>', 'loc_names': ['auto ns::Foo<double>::func<int>()']},
+            {'name': 'ns::Foo<double>::func<int>', 'loc_names': ['auto ns::Foo<double>::func<int>()']},
             {'name': 'func', 'loc_names': ['auto ns::Foo<double>::func<int>()',
                                            'auto ns::Foo<double>::func<ns::Foo<int>>()']},