I had to go back a ways to make sure this thread was about cat nicknames...
All my cats have the following nicknames - fuzzpaw, fuzzypants, kittenkins, baby cat, baby (fill in blank with real name)
Goose is also known as goosen, goosentine (this will make more sense as you read lower), gosling, gozzle, goosiepaws
Clementine is AKA clem, clemmie, clemen, clemenshoes, clemenpaws, phlegmentine (when sneezing), kemmen, c-lemon, clemenhead
Winnie is AKA winnifred, winnietine, winfred, winniehead, winniekins, win, winnie the pooh, pooh, poohkins
Elsa is AKA elsakins, elsapoo, el zappo (sort of a mispronounciation of elsapoo), the baby, else
I have no idea why we decided to give all the cats a name that rhymed with Clementine, but the -kins comes from my nickname as a child to all my parents, aunts, uncles and older cousins, Juliekins. I'm 30 and my aunt still calls me that.