There were a lot of cool gangster names back in the 30's.
Names like:
Machine Gun Kelly
Pretty Boy Floyd
Baby Face Nelson
Handsome Jack Klutas
Ma Barker
Baron Lamm
Jelly Nash
But then there was ...
Alvin "Creepy" Karpis



Alvin "Creepy" Karpis, sort of lives up to his nickname doesn't he.
I mean if Alvin wasn't bad enough, and it was, then you get saddled with a last name of Karpis, finally you throw in Creepy and you have the trifecta for getting your ass kicked on a daily basis name.
No wonder he turned to a life of crime.
Footnote on Creepy Karpis: he was one of the few depression era gangsters that served his time, and lived to a relatively ripe old age.