Roger FitzJohn Clavering
Roger was born about 1247 in Clavering, Essex, England.  He died on April 29th, 1310.

 Margery la Zouche
Margery was born about 1251 in Clavering, Essex, England.

 Baron John FitzRobert de Clavering
John FitzRobert was born about 1266 in Costessey, Norfolk, England.  He died in 1299.