John Grey most often written Jean Gris.

Is this the same person as "John Grey, Knight, capitaine of Yomins" that one finds in 1435 in the retinue of the Duke of Bedford? or Sir John Gray?

A Jehan Grey is remitted his possessions by the King of England in 1419, October 3 (Bibl. Nat. ms. fr. 26043); one finds a Jean de Grey, captain of Argentan for King Henry in 1420 (Bibl. Nat. ms. fr. 26043)

A Jean Gray, Knight, captain of Exmes (1430?) gave a receipt for wages to P. Baille, receiver-general of Normandy.