Bohun, Humphrey V de, 2d earl of Hereford and 1st earl of Essex, d. 1275, English nobleman; son of Henry de Bohun, 1st earl of Hereford. A member of the household of Henry III, he inherited the earldom of Essex from a maternal uncle and in 1242 went with the king on his French campaign. In 1258 he joined the baronial opposition to Henry and was one of 24 men who drew up the Provisions of Oxford. In the Barons' War, however, he returned (1263) to the side of the king and was captured (1264) by Simon de Montfort at Lewes.
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