Maurice de Berkeley, 2nd Baron Berkeley Maurice de Berkeley, 2nd Baron Berkeley Maurice de Berkeley, 2nd Baron Berkeley (April 1271 – 31 May 1326), "The Magnanimous", feudal baron of Berkeley, of Berkeley Castle in Gloucestershire, England, was a peer. He rebelled against King Edward II and the Despencers. 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 at Berkeley Castle, the eldest son and heir of Thomas de Berkeley, 1st Baron Berkeley (1245–1321),
Margaret Mortimer, Baroness Berkeley Margaret Mortimer, Baroness Berkeley Margaret Mortimer, Baroness Berkeley (2 May 1304 – 5 May 1337) was the wife of Thomas de Berkeley, 3rd Baron Berkeley. She was the eldest daughter of Roger Mortimer, 1st Earl of March, the "de facto" ruler of England from 1327 to 1330, and his wife Joan de Geneville, Baroness Geneville. Margaret Mortimer was the eldest of the twelve children of Roger Mortimer, 1st Earl of March and Joan de Geneville, Baroness Geneville. Her paternal grandparents were Edmund Mortimer, 2nd Baron Mortimer and Margaret de Fiennes. Her maternal grandparents were Piers de Geneville, of Trim Castle