The jarls were periodically subject to the kings of Alba for those parts of their territory in what is now mainland Scotland (i.e. Caithness and Sutherland). In 1232, a Scottish dynasty descended from the Mormaers of Angus replaced the previous family descended from the late 10th century jarl Torf-Einarr, although the "Norðreyjar" remained formally subject to Norway. This family was in turn replaced by the descendants of the Mormaers of Strathearn and later still by the Sinclair family, during whose time Orkney and Shetland became part of Scotland.