This family descended from Henry de Erskine who owned the barony of Erskine in Renfrewshire in the 13th century. During the War of Independence they supported King Robert the Bruce. In 1435 Sir Robert Erskine assumed the title of Earl of Mar and his son, who was deprived of the Earldom in 1457, was created Lord Erskine in 1467. Alexander, son of the 4th Lord, was ancestor of the Earls of Kellie. The Earldom of Mar was restored in 1565 and the 6th Earl is notable for the part he played in the Jacobite Rising of 1715. There are several important branches of this family.