Names, schmames. How many of us here have a chicken named Nugget? If that isn't some sort of passive/aggressive pet name I don't know what is. I routinely call my freeloaders and threaten the dears with stew, and my silkie roo's usual nickname can't be printed on a family friendly forum but it starts with "you little" and ends with "it".
My brother is Brett, routinely called brat by his sisters. And my husbund has a cousin called Buck; not a bad nickname, but it started as Slopbucket because he was such a messy kit.