Sir Henry de Percy
Sir Henry de Percy (c. 1235 – 29 August 1272), eldest son of William de Percy, was knighted by 1257, when he served Henry III in Wales.
In the Second Barons' War he fought at Northampton in April 1264 and was captured at Lewes in May, remaining a prisoner until after Evesham in 1265. In September 1268 he married Eleanor de Warenne, daughter of the Earl of Surrey. He died in 1272; his posthumous son became 1st Baron Percy.