Humphrey de Bohun , 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 de Bohun, fought on the side of the rebellious barons in the Barons War. When Humphrey predeceased his father, Humphrey became heir to his grandfather, Humphrey . At Humphrey s death in 1275, Humphrey inherited the earldoms of Hereford and Essex. He also inherited major possessions in the Welsh Marches from his mother, Eleanor de Braose.
In 1275 Bohun married Maud de Fiennes, daughter of Enguerrand de Fiennes, chevalier, seigneur of Fiennes, by his 2nd wife, Isabel . She predeceased him, and was buried at Walden Priory in Essex. Hereford himself died at Pleshey Castle onDecember 1298, and was buried at Walden alongside his wife. They had one son Humphrey de Bohun, 4th Earl of Hereford, born around 1276. The son was given possession of his fathers lands and titles onFebruary 1299. The young Humphrey also inherited his fathers title of Constable of England.
Source: Wikipedia