My first shepherd was a rescue and came with the name King. It didn't fit his goofy, gangly self at all, but I can't bring myself to change the name of a dog if they come with one (my golden is named Carly, which I would've never chosen but now can't see her with any other name) so King he was. We lost him much too young, so when we were finally ready to bring home another dog, we knew we wanted his namesake to be a part of it. After much deliberation, we landed on 'Cash' as in Johnny Cash. Our boy is almost solid black and if you google The Million Dollar Quartet, the King association ties in nicely.