Playing the evil Nazi / "Butcher" Harris here:
He was sometimes known as "Butch" which is quite different from "Butcher". Butch was a name applied to a forthright,tenacious or determined individual. Butcher is an inappropriate post war revision which I whole heartedly discourage.
He was also known as "Bert" which,for reasons I cannot explain, seems to have been given to people with the surname Harris at that time and of course "Bomber".
Cheers
Steve