William de Moravia, 5th Earl of Sutherland

William de Moravia, 5th Earl of Sutherland and chief of Clan Sutherland, succeeded his father Kenneth in 1333 and was a loyal supporter of David II in the wars against England. In 1345 he married Margaret Bruce, daughter of Robert the Bruce; their son John of Sutherland was once regarded as an heir to the crown but died of plague in London.

After Margaret's death he married Joanna Menteith in 1346, by whom he had Robert, later 6th Earl. William last appears on record in 1370 and was certainly dead before 1389.