There is, of course, no such thing as a family crest. Nor was there ever such a thing. A crest is part of a coat of arms, otherwise an armorial achievement.Which is granted to an individual and passes, on his death, to his older son. There is a convention that a crest can be used within a belt and buckle by another member of the family. The belt and buckle signify "this is not my crest". The notion of a family crest was propogated by Victorian stationers who were trying to sell their wares.