the two hyphenated people

A similar thing has happened. In armory, if an armigerous woman marries an armigerous man they will quarter their arms. If one of their armigerous children marries another armigerous person the quartered arms can be either quartered or impaled with the arms of the other person. If that other person also bears quartered arms, hoo boy! It can start getting perty dang ugly in just a few generations.

http://www.baronage.co.uk/bpgif-01/buthlaw1.jpg