Robert de St. John
Robert de was born about 1199 in Basing, Hampshire, England.  He died about 1269.

 Agnes De Cantilupe
Agnes was born about 1202 in Calstone, Wiltshire, England.

 John De Saint John
John De was born about 1225 in Basing, Hampshire, England.  He died on September 29th, 1302.