Roger de Quincy, d. 25 Apr 1264, 2nd Earl of Winchester, Constable of Scotland; m. (1) Helen of Galloway. [Magna Charta Sureties]
Roger (DE QUENCY), 2nd EARL OF WINCHESTER, CONSTABLE OF SCOTLAND, by his 1st wife, Helen, 2nd but 1st surviving daughter and coheir of Alan, LORD OF GALLOWAY, CONSTABLE OF SCOTLAND. [Complete Peerage]