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
Berkeley Castle genealogy documentary television series "Who Do You Think You Are?", with American actress Courteney Cox looking into her ancestry. Cox learns that she is a 21-generation direct descendant of Thomas de Berkeley, 3rd Baron Berkeley and 22-generation descendant of de Berkeley’s father-in-law, Roger Mortimer, 1st Earl of March – also learning of their parts in the murder of King Edward II of England at Berkeley Castle in 1327. Two ships of the Royal Navy have been named "Berkeley Castle" after the castle, as has a Great Western locomotive. Berkeley Castle Berkeley Castle ( ; historically sometimes spelt "Berkley Castle" or