John de Grey , of Thurrock
John de was born about 1150 in Thurrock Grey, Essex, England.

 Elana de Clare
Elana de was born about 1155 in Tunbridge Castle, Kent, England.

 Agnes Grey
Agnes was born about 1175 in Rothersfield, Oxfordshire, England.

 Henry de Grey , Lord of Codnor
Henry de was born in 1176 in Thurrock Grey, Essex, England.  He died at the age of 43 in 1219 in Codnor, Derbyshire, England.