Hi! My family's first yorkie was Booger Bear...and Mom called him Buddy Boo all the time. She called him Booger Bear because he looked like a booger (a monster, not what comes from a nose!) from the front and a bear from the back. He ended up being Booger Bear 5 when she got his papers back!
Our next yorkie's name is Roxie LeAnn, with LeAnn being her mother's name..so if you know the parents' names you might do something like that.
I guess my mom got desperate on the third puppy and named him Sir Dandy, and he goes by Dandy.
Now we have 3 puppies from Roxie and Dandy so there's no telling what kind of names we'll end up with!
Just some ideas...good luck!