Welcome to YT.

I think you can google "female pet names" and they'll give you a ton.
I'm not sure if you're aware but 6 weeks is
extremely young for a yorkie to leave her mom. That's pretty young for any dog, but toy breeds tend to benefit much more from staying with their mom until 12 weeks or so.
I know you're excited about getting her, but anyway the breeder would keep her longer? It'll save you some problems in the long run.
Good luck either way with your new baby!