1st Lord Grey of Rotherfield. Knight of the Garter, of Rotherfield, Cogges, Hardwick in Yelford and Somerton, Oxfordshire. of Shabbington, Buckinghamshire, of Duston, Northamptonshire, of Olton in Solihull, Warwickshire, of Kettlewell, Sculcoates and Upton in Badworth, Yorkshire. Steward of the King's Household.
Son and heir to Sir John Grey and Margaret Oddingseles.
Grandson of Sir Robert de Grey and Joan Valoines, William de Oddingseles and Ela FitzWalter.
Husband of Katherine FitzAlan, daughter of Brian FitzAlan, Guardian of Scotland and his second wife, Maud. They were married before 01 March 1312, and father of John. Katherine died 07 August 1328, buried at Black Friars, York.
Secondly, husband of Avice Marmion, daughter of Sir John Marmion and Maud de Furnival, Lord Furnival. They married before 1343 and had two sons and one daughter; Sir John. Sir Robert and Maud.
Sir John fought in Scotland in 1327 and 1335, then in France 1342 to 1346. John had a quarrel with Sir William la Zouche de Mortimer, Lord Zouche, and drew his knife on William in the King Edward III's presence in 1332, which resulted in his imprisonment. Sir John sought a pardon 27 March 1332 and received restoration. There was a suit against a Richard de Jarpenville regarding lands in Shabbington in 1328.
John was at the Crecy expedition, the 2nd division, in 1346. He received licence to crenellate his residences at Rotherfield and Sculcoates in 1346.
Sir John was a founder of the Knights of the Order of Garter.