Maurice de Berkeley, 4th Baron Berkeley Maurice de Berkeley, 4th Baron Berkeley Maurice de Berkeley, 4th Baron Berkeley (c. 1330 – 8 June 1368), "The Valiant", feudal baron of Berkeley, of Berkeley Castle in Gloucestershire, was an English peer. His epithet, and that of each previous and subsequent head of his family, was coined by John Smyth of Nibley (died 1641), steward of the Berkeley estates, the biographer of the family and author of "Lives of the Berkeleys". He was born in Berkeley Castle in Gloucestershire, the eldest son and heir of Thomas de Berkeley, 3rd Baron Berkeley by his wife Lady Margaret Mortimer. In August
James Berkeley, 1st Baron Berkeley cousin Elizabeth, daughter of the fifth Baron Berkeley and wife of Richard de Beauchamp, 13th Earl of Warwick. He was unable initially to claim Berkeley Castle, as it was taken in possession by the Earl and Countess of Warwick. In 1421, when the Warwicks finally gave up Berkeley Castle, James was summoned to Parliament by writ as Lord Berkeley. The feud did not end there as his third wife Isabel was captured by the Countess of Warwick's son-in-law the Earl of Shrewsbury, and held imprisoned until her death in 1452. Lord Berkeley was succeeded by his son from his third