None of my pets have ever had human-sounding names. Not intentional, but still…
Let's see, there were the cats: Butch and Mickey (my parents got them before I was born), Snowball and Misty, and currently Champers. I also had a
Jerusalem cricket named Stripes. Somehow none of these seem to work as first names for a nom-de-plume, although I could imagine making them work as stripper names.