What's the story behind your dog's name?

One of my dog's names is Luna. She's a black terrier who loves barking at crows, hunting mice and lizards in the garden and any type of competitive play.
I named her after a character from the manga Sailor V. In the more well-known Sailor Moon anime, Luna is the title heroine's cat, however in the Sailor V manga there's a black dog with the same name. I found the name perfect for my then puppy, because it's cute and rolls off the tongue.
I've got another dog - a minpin mix - but he's name is not that interesting. We adopted him off the street and called him the only name that he recognized - Tommy.