diff --git a/src/libraries/System.Private.CoreLib/src/System/Threading/Thread.cs b/src/libraries/System.Private.CoreLib/src/System/Threading/Thread.cs
index f92abc7789ab7c..25c20786826a01 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Threading/Thread.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Threading/Thread.cs
@@ -72,6 +72,18 @@ private void RunWorker()
 
                 try
                 {
+#if TARGET_OSX || NATIVEAOT
+                    // On other platforms, when the underlying native thread is created,
+                    // the thread name is set to the name of the managed thread by another thread.
+                    // However, on OS X and NativeAOT (across all OSes), only the thread itself can set its name.
+                    // Therefore, by this point the native thread is still unnamed as it has not started yet.
+                    Thread thread = Thread.CurrentThread;
+                    if (!string.IsNullOrEmpty(thread.Name))
+                    {
+                        // Name the underlying native thread to match the managed thread name.
+                        thread.ThreadNameChanged(thread.Name);
+                    }
+#endif
                     if (start is ThreadStart threadStart)
                     {
                         threadStart();