John was the second son of
Henry de Grey of
Grays Thurrock in
Essex. He served as
High Sheriff of Bedfordshire and Buckinghamshire in 1238–39 and of
High Sheriff of Herefordshire in 1252–53, undertaking military service in
Flanders in 1232. He lived at
Shirland in
Derbyshire, married three times and his son, by his second wife, was
Reginald de Grey, 1st Baron Grey de Wilton. He was accordingly an ancestor of many of the noble houses with the surname Grey. He died in March 1266. ==References==