http://thepeerage.com/p2588.htm#i25871

http://en.wikipedia.org/wiki/Thomas_Erskine,_2nd_Lord_Erskine

Thomas Erskine, 2nd Lord Erskine (d. 1494), de jure 14th Earl of Mar, was a Scottish peer.

Erskine was the son of Robert Erskine, 1st Lord Erskine, and Elizabeth, daughter of David Lindsay, 1st Earl of Crawford. He married Janet Douglas. They had several children. One daughter, Helen, married Humphrey Colquhoun of Luss, son of Sir John Colquhoun of Luss. Another daughter, Margaret, married William Keith, 1st Earl Marischal.[1]

Lord Erskine died in 1494 and was succeeded by his son, Alexander.

http://www.erskinclan.com/gene4.html

Thomas Erskine, the King's bodyguard, foiled the Gowrie Conspiracy and was enobled as Lord Erskine by James II in 1460.

http://www.instirling.com/sight/tower.htm