Help me with a cool name for 7 week old Mastiff

This Sunday I'm getting a Cane Corso (Italian Mastiff puppy). My son wants to name him Shadow. Isn't this a name for a black and white cat? I like the name Thor but because I though of it that's off the board (got teens?)This male dog will weigh between 150-175 lbs. He's a blue brindle.

Any name suggestions?

NON ANIMAL LOVERS: Please exit before posting. At eight months this puppy will weigh over a hundred pounds. If I don't like you neither will my Cane Corso and two other very large bread dogs.