John II de St. John
John II de was born in October 1273 in Basing, Hampshire, England.  He died at the age of 55 on May 14th, 1329.

 Isabel de Courtenay
Isabel was born in 1283 in Okehampton, Devonshire, England.

 Hugh St. John
Hugh was born about 1310.  He died before October 25th, 1335.

 Margaret St. John
Margaret was born in Hatch, Somerset, England.  She died on November 19th, 1361.