He [Conan Duke of Brittany] married, in 1160, Margaret of Scotland, sister of MALCOLM IV, King of Scofland, and daughter of Henry, EARL OF HUNTINGDON, by Ada or Adeline, daughter of William (DE WARENNE), EARL OF SURREY. He died 20 February 1171. His widow married, 2ndly, before Easter 1175, Humphrey DE BOHUN, Constable of England; she died in 1201, and was buried at Sawtrey Abbey, Hunts. [Complete Peerage X:791-3, XIV:545, (transcribed by Dave Utzinger)]
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Margaret of Scotland, dau. of Henry, Earl of Huntingdon, sister of William, King of Scots, and widow of Conan le Petit, Earl of Brittany and Richmond. [Sir Bernard Burke, Dormant and Extinct Peerages, Burke's Peerage, London, 1883, p. 57, Bohun, Earls of Hereford, Earls of Essex, Earls of Northampton, and High Constables of England]