Sir John De Grey
Sir John was born on October 29th, 1300 in Rotherfield Grey, Oxfordshire, England.  He died at the age of 58 on September 1st, 1359.

 Catherine FitzAlan
Catherine was born in 1300 in Bedall, Yorkshire, England.  She died at the age of 28 on August 7th, 1328.

 Joan De Grey
Joan was born in 1322 in Rotherfield Grey, Oxfordshire, England.

 John De Grey
John was born about 1340 in Barton, North Riding, Yorkshire, England.