The Argentclaws are a clan of Dragonborn that are sponsored by a silver dragon. They aren't a special clan except that their sponsor had a mirror finish to his scales. The Argentclaws are mostly made up of merchants, lawyers, and herbalists, with some noblemen making up their ranks. They are an overlooked clan when the Warfires and the Goldenflames often jockey for position.
Argentclaw dragonborn are usually distinguished by their high incidence of silver scaled dragonborn within the family, betraying heritage to the silver dragons.