 Humphrey ( V ) de Bohun ( c . 1249 – 31 December 1298 ) , 3rd Earl of Hereford and 2nd Earl of Essex , was an English nobleman known primarily for his opposition to King Edward I over the Confirmatio Cartarum . He was also an active participant in the Welsh Wars and maintained for several years a private feud with the earl of Gloucester . His father , Humphrey ( V ) de Bohun , fought on the side of the rebellious barons in the Barons ' War . When Humphrey ( V ) predeceased his father , Humphrey ( VI ) became heir to his grandfather , Humphrey ( IV ) . At Humphrey ( IV ) ' s death in 1275 , Humphrey ( VI ) inherited the earldoms of Hereford and Essex . He also inherited major possessions in the Welsh Marches from his mother , Eleanor de Braose . 
