See here: This name is often used on babies who, without being Levis (Jewish hereditary priesthood), are of Levi descent. -- Miss Claire 12/5/2004If you're not of Levi descent, it's pretty disrespectful. Same for Cohen.
Ah, I didn't know. I've known a lot of people named Levi (I've even known a man named Leviticus who used it as a nn) and of course with it being the name of brand of jeans, I had no idea that it was disrespectful to some people.