John De Grey
John was born about 1226 in Codnor, , , England.  He died before January 5th, 1271 in , , , England.  He was buried before January 5th, 1271 in , , , England.

 Lucy De Mohun
Lucy was born about 1226 in Dunstan, , , England.  She died after 1282 in , , , England.  She was buried after 1282 in , , , England.

 Henry De Grey
Henry was born about 1256 in Codnor, , , England.  He died in September 1308 in , , , England.  He was buried in September 1308 in , , , England.