born:  1279
died: 11 June 1345

Father: John St. John  (born 1225 in Basing, Hampshire; died 29 September 1302)
Mother:  Alice FitzPiers

Spouse:  Sir Hugh de Courtenay, 9th Earl of Devon

Children:
1. Sir Hugh de Courtenay, K.G., 10th Earl of Devon
2. Sir Thomas Courtenay