A coat of arms never belongs to a family, but to an individual. The only person entitled to use it is the person officially granted its use. Not even his family members can legally use it. I'm not sure if this place is even in Scotland. If your Robert Hog from Glasgow had personal arms, it would have been reflected in the contemporary documents. He would have been described as "Robert Hog of ...." followed by the name of a landholding he had.
