John de Courtenay
John was born in 1218 in Okehampton, Devonshire, England.  He died at the age of 56 on May 3rd, 1274 in Okehampton, Devonshire, England.

 Isabel de Vere
Isabel was born about 1228 in Coline, Essex, England.  She died in 1300.

 Hugh de Courtenay
Hugh was born on March 25th, 1249 in Okehampton, Devonshire, England.  He died in Cullicomb, Devonshire, England.