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

 Isabella De Courtenay
Isabella was born in 1283 in Okehampton, Devonshire, England.

 Margaret De St. John
Margaret De was born in 1308.  She died at the age of 53 on November 19th, 1361.

 Elizabeth St. John
She died in 1411 in England.