Mine both have registered names. Sherman was named at his kennel, his reg. name is "Destiny's Raise The Bar" (I guess because he had a dark bar running down his nose) I'm not sure how he got his call name Sherman, but it really fits his personality.

We named Star by each of us thinking of a name we liked and then combining them - her name is Blue Moon Star. I just love it.

Someone suggested something with "Moonlight" in it - that seems to fit her coloring, she's very silvery like moonlight! maybe think of a couple other ideas that go with that?
maybe something like...
Moonlight's Silver Echo
or
Moonlight Shadow