Delaware's most infamous woman, Martha "Patty" Cannon, comes immediately to mind re: Patty as a nn for Martha. She was kind of a bounty hunter, who with her crew kidnapped free black people or escaped slaves and turned them in, or robbed and killed them.
Anyway, Patricia is pretty, but I don't really care for Patty, because it seems even more middle-aged than Patricia does. pat is a bit more brisk and fresh, and Tricia more youthful.
I think, therefore I judge.