 Humphrey ( V ) had been excluded from succession as a result of his rebellion , but when Humphrey ( IV ) died in 1275 , Humphrey ( VI ) inherited the earldoms of Hereford and Essex . Humphrey ( VI ) had already served as deputy Constable of England under Humphrey ( IV ) . Humphrey ( IV ) had reserved the honour of Pleshey for his younger son Henry , but the remainder of his lands went to Humphrey ( VI ) . The inheritance Humphrey ( VI ) received – in addition to land in Essex and Wiltshire from Humphrey ( IV ) – also consisted of significant holdings in the Welsh Marches from his mother . His mother Eleanor was a daughter and coheir of William de Braose and his wife Eva Marshal , who in turn was the daughter and coheir of William Marshal , regent to Henry III . 
