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
Nottingham Castle were acting as Regents during Edward's minority following their murder of his father Edward II at Berkeley Castle. William Montagu and his companions, were accompanied by William Eland, castellan and overseer of Mortimer's castle, who knew the location of a secret tunnel which would take them up to a locked door higher up in the castle to a normally locked door. In the dark of night on 19 October 1330, Montagu and his companions entered the tunnel, climbed up to the door, which had now been unlocked either by Edward III or a trusted servant, overpowered Mortimer, killing Mortimer's personal