diff --git a/llvm/include/llvm/ADT/StringRef.h b/llvm/include/llvm/ADT/StringRef.h
--- a/llvm/include/llvm/ADT/StringRef.h
+++ b/llvm/include/llvm/ADT/StringRef.h
@@ -264,7 +264,10 @@
 
     /// Check if this string starts with the given \p Prefix, ignoring case.
     [[nodiscard]] bool starts_with_insensitive(StringRef Prefix) const;
-    [[nodiscard]] bool startswith_insensitive(StringRef Prefix) const {
+    [[nodiscard]] LLVM_DEPRECATED(
+        "Use starts_with_insensitive instead",
+        "starts_with_insensitive") bool startswith_insensitive(StringRef Prefix)
+        const {
       return starts_with_insensitive(Prefix);
     }
 
@@ -280,7 +283,10 @@
 
     /// Check if this string ends with the given \p Suffix, ignoring case.
     [[nodiscard]] bool ends_with_insensitive(StringRef Suffix) const;
-    [[nodiscard]] bool endswith_insensitive(StringRef Suffix) const {
+    [[nodiscard]] LLVM_DEPRECATED(
+        "Use ends_with_insensitive instead",
+        "ends_with_insensitive") bool endswith_insensitive(StringRef Suffix)
+        const {
       return ends_with_insensitive(Suffix);
     }