I think it's because its one of the few words that we can't substitute a different word for.. your name is your name,so you're forced to say it and the speaking stress makes you stutter on it. I've had multiple people over the years ask me if I "forgot my name " not knowing I had a stutter.. i always thought that was the weirdest assumption to make but,hey. I've read about people that have a stutter and have legally changed their name to a name they can say fluently.. only to start stuttering when they're trying to say their new name. Lotsa luck 🙃🙂