Sir Thomas Stewart, Master of Mar was an illegitimate son ofAlexander Stewart, the earl of Mar. He was the great-grandson ofKing Robert II of Scotland. He died before August 1432.^[1]

Thomas married Elizabeth, the widow ofJohn Stewart, 2nd Earl of Buchan, who was daughter ofArchibald Douglas, 4th Earl of Douglas and Margaret Stewart, Lady of Galloway.^[2] They were required to obtain a marriage license, which was granted on 1 May 1427, due to their degrees ofconsanguinity andaffinity.^[3]

• Douglas Richardson, Royal Ancestry: A Study in Colonial and Medieval Families (2013).
• Mosley, Charles, editor. Burke's Peerage, Baronetage & Knightage, 107th edition, Vol. 2. Wilmington, Delaware, U.S.A.: Burke's Peerage (Genealogical Books) Ltd, 2003.
• The Scots Peerage, Vol. III, edited by Sir James Balfour Paul

• 1430s deaths
• 15th-century Scottish nobility
• Children of peers and peeresses
• House of Stuart
• Illegitimate branches of the House of Stuart

• Use dmy dates from April 2022