I like my pets names to have a theme.... you may want to think of something with a theme, because trust me you wont have only one yorkie for long
I am naming my kids after designers... I have Armani and Chloe so far! Already have a list of boy and girl names picked out for whenever the next little critters come along.
I also love the name Bella but I named one of my parents dogs that when I lived home.
Other themes I had thought about using were city names (brooklyn, bronx, london, paris, vegas, etc.)
I thought about doing a vegas theme (Chip, Ace, BlackJack...)
Movie Themes (example: Legally Blonde... Elle, Bruiser... ) <--- named another dog growing up Elle so this was kind of already taken as well.
Good Luck... a lot of times a name just picks itself... I had planned to name my little girl Dior and it just didnt fit her at all, she never came to it or anything, after one day of switching it to Chloe she was responding to it and just LOOKED like a Chloe.