Margaret de Beaumont 12th-century English noblewomen (d. 1235) Parents Petronilla de Grandmesnil, countess of Leicester Robert de Beaumont, 3rd Earl of Leicester Children Roger de Quincy, 2nd Earl of Winchester Robert de Quincy Robert de Quincy Hawise de Quincy Arabella de Quency Siblings Sir William de Hamilton Robert de Beaumont, 4th Earl of Leicester Roger de Beaumont Amice Partners Saer de Quincy, 1st Earl of Winchester