Sir Walter de Grey of Rotherfield
Walter was born about 1222 in Rotherfield Greys, Henley-On-Thames, Oxfordshire, England.  He died in Somerton, Bicester, Oxfordshire, England.

 Isabel de Duston
Isabel was born about 1224 in Duston, Northamptonshire, England.  She died before 1305.

 Sir Robert de Grey
Robert was born in Rotherfield Greys Castle, Henley-On-Thames, Oxfordshire, England.  He died before May 27th, 1295.