Humphrey de Bohun, 7th Earl of Hereford, 6th Earl of Essex, 2nd Earl of Northampton, KG was the son of William de Bohun, 1st Earl of Northampton, and Elizabeth de Badlesmere, and grandson of Humphrey de Bohun, 3rd Earl of Hereford, by Elizabeth of Rhuddlan, daughter of King Edward I. He became heir to the Earldom of Hereford after the death of his childless uncle Humphrey de Bohun, 6th Earl of Hereford. Following King Peter I's visit to England, Humphrey participated in the sack of Alexandria in 1365. Wikipedia