Lady Mary Stewart (abt. 1380-1457); daughter of Robert III of Scotland and Anabella Drummond (d. 1458) Parents Anabella Drummond Robert III of Scotland Children Robert Graham Walter Graham Gilbert Kennedy, 1st Lord Kennedy William Graeme, 1st of Garvock Mary Edmondstone Sir John Kennedy Sir William Edmonstone, 2nd of Duntreath Lady Elizabeth Douglas William Douglas, 2nd Earl of Angus James Kennedy Mary Kennedy Patrick Graham Siblings Margaret Douglas Egidia Stewart James I of Scotland David Stewart, Duke of Rothesay Lady Elizabeth Stewart Robert Stewart Sir John Stewart James Stewart of Kilbride Partners James Kennedy Sir William Edmondstone, 1st of Duntreath Sir William Graham George Douglas, 1st Earl of Angus