Maurice de Berkeley Maurice de Berkeley Sir Maurice de Berkeley "the Resolute" (1218 - 4 April 1281), 5th (feudal) Baron de Berkeley, was an English soldier and rebel, residing at Berkeley Castle in the English county of Gloucestershire. Maurice was born in 1218 to Thomas de Berkeley and Joan de Somery. He married Isabel FitzRoy, the daughter of Richard FitzRoy, Baron of Chilham (an illegitimate son of King John of England) and Rose de Douvres, sometime before 12 July 1247. Berkeley fought in the French Wars and was invested as a knight before 1242. He inherited the title of Baron de Berkeley in
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