 The chiefs of the Clan Mar were the original Earls of Mar, although this title later went via an heiress to the Douglases in the late fourteenth century, and then to the Stewarts before going to the Erskines.The current chief of Clan Mar is Margaret of Mar, Countess.One of the seven ancient provinces or kingdoms of Scotland that was ruled by a "Mormaer", which was an ancient Pictish equivalent of an Earl, was the "Mormaerdom of Mar".