John de Courtney Baron of Okehampton ¹

  General Notes:

Knight of Okehampton, Chulmeleigh, Musbury, Devon, of Sutton Courtenay, Berkshire, of Iwerne Coutenay, Dorset, of Eaddeson, Buckinghamshire.

Son and heir to Sir Robert de Courtenay and Mary de Vernon, daughter of William, the Earl of Devon.

Husband of Isabel de Vere, daughter of Hugh de Vere, Earl of Oxford and Hawise de Quincy. They had one son, Sir Hugh.

Isabel's maritagium included the manors of Hillesdon and Waverdon, Buckinghamshire. Sir John serviced in Gascony in 1248 and in Wales in 1257 and 1258.

John married Lady Isabel de Vere, daughter of Hugh de Vere Great Chamberlain of England and Fourth Earl of Oxford and Hawise de Quincy. (Lady Isabel de Vere was born about 1222 in Totnes, Devon, England and died on 11 Aug 1300 in Woodbury, East Devon District, Devon, England.)