All my yorks have started with the letter B. First I didn't think about it.
My first york's name was Bitteli (means tiny in norwegian), it was the breeder who chose it for us. The next one, his breeder name was Espris Virvelvind (virvelvind is tornado), so I called him Bajaz (means crazy).
I thought that my next york would be named Bambie. And then I realized I used the letter B....and my brother owns Bambie's brother, and he is a U2 fan and called his dog Bono.
So I think I will always try to continue finding names on B