The de Crioll family was variously involved in the revolt of 1264. Richard de Clare had died in 1262, reputedly in the house of John de Crioll at Bletchingley, and Sir John himself, having been summoned to fight the Welsh in 1263, died not long afterwards. His son Sir Bertram (to whom in February 1264 Roger de Leybourne confirmed the lease of the manor of Dartford) was with Gilbert de Clare in the siege of Rochester Castle, which was held for the king by de Leybourne. An inquisition upon the rebels described Bertram as an enemy of King Henry's and King Edward's, being of the household of Sir Henry de Montfort, and that certain lands of his were seized by the Earl of Gloucester and afterwards by Roger de Leybourne, but were later redeemed. His kinsman Robert de Crevecoeur, grandson and heir of Hamo, was with Simon de Montfort at the Battle of Lewes. The same inquest records that Laurence de Fonte of Canterbury was with Sir Nicholas de Crioll before, during and after the war, and stayed with him until his death, but it was not believed that he was present at any siege or spoil. In September 1265 Nicholas de Crioll, Knight, was, with John de Chausy (Templar) and Richard de Maneton (Hospitaller) charged with ensuring the safe conduct of the envoys of the King of France into the king's presence.