Sir John de Saint John
John was born in October 1276 in Basing, Hampshire, England.  He died at the age of 52 on May 14th, 1329 in Basing, Hampshire, England.

 Isabell de Courtenay
Isabell was born about 1283 in Okehampton, Devonshire, England.  She died after May 10th, 1325 in Basing, Hampshire, England.

 Margaret Saint John
Margaret was born about 1308 in Basing, Hampshire, England.  She died on November 19th, 1361 in Hatch, Somersetshire, England.