Source: Margaret de Bohun
Title: Knight of the Garter, 10th Earl of Devon, 2nd Lord of Courtenay, of Okehampton, Cadeleigh, Colcombe, Honiton, Huntebeare, Whitwell (in Colyton), etc., Devon, Wavendon, Buckinghamshire, Ibberton, Dorset, Crowell and Nuneham (in Nuneham Courtenay), Oxfordshire, East Coker, Somerset, etc., Joint Warden of Devon and Cornwall, Chief Warden of Devon, son and heir of Hugh de Courtenay, Knight, 9th Earl of Devon, 1st Lord Courtenay, of Okehampton, Devon, Waddesdon, Buckinghamshire, Nuneham (in Nuneham Courtenay), Oxfordshire, etc., by Agnes, daughter of John de Saint John, Knt.
File: Lady Margaret de Bohun _ Royal Descent
Name: Hugh Courtenay, 2nd Earl of Devon
File: Sir. Edward Courtenay, Knight (Abt 1329 - Bef 1371) Our Family Histories
Name: Hugh III de Courtenay, Earl of Devon