Def no H 
But def the other "U" which i don't have 
You might be right, seems like he changed his name in the US, or it could be that he was never written with that h, which is very odd, because the name Guenther in german always has that h.
It never occured to me that it might be missing, and in all german BB-magazines he was written with that h.
i checked his internetpage, which is pretty old, but there he has no h.
point goes to you!
