I like this name. It's cool and gives you the impression of a criminal (or felon) and could also be a good name of a fantasy character in a book/movie.
Felinus would make a good middle name. I can't believe no one has commented on this name yet. A name like this (like its related names Feline and Felina) usually draws strings of commenters complaining about how it's an awful name for a child, etc., even though this site has all names, not just modern baby names. Anyway, I like this name, but definitely not as a first name, which would end badly. Middle name= good. I like the nickname Fel. I like guy's names with Fel in them, like Astrophel. Fel/Phel is better than Phil.