Rock

Rock means exactly what you think it means. The main reason for thinking of the word rock as a possible name for a person is the fame of actor Rock Hudson. In the actor's case the name was a stage name, given to the actor to evoke an image of strength (as in Rock of Gibraltar.) His real name was Roy. Rock never caught on as a popular name for boys, but it does make a wonderful name for a dog, either as a name in its own right, or as a shortened form of Rocket.