Margaret Grey de Ruthyn

Margaret Grey (died after May 1426 and before Oct. 1427) was a Cambro-Norman noblewoman, the daughter of Reginald Grey, 3rd Baron Grey de Ruthyn, a powerful Welsh Marcher Lord, who was the implacable enemy of Owain Glyndŵr.

Margaret was the first wife of Sir William Bonville, later the 1st Baron Bonville who was decapitated by Queen consort Margaret of Anjou following the Yorkist defeat at the Second Battle of St Albans. Margaret was the great-grandmother of Cecily Bonville who succeeded to the estates and baronies of Bonville and Harington, thus becoming the wealthiest heiress in England.

Margaret Grey was born in Ruthin Castle, Denbighshire, Wales on an unknown date, the eldest daughter of Reginald Grey, 3rd Baron Grey de Ruthyn and Margaret de Ros. She had three brothers and two younger sisters. Her eldest brother was Sir John Grey KG who married Constance Holland, the granddaughter of John of Gaunt. Her paternal grandparents were Reginald Grey, 2nd Baron Grey de Ruthyn and Alianore Le Strange of Blackmere, and her maternal grandparents were Thomas de Ros, 4th Baron de Ros and Beatrice Stafford.

Her father was a powerful Marcher Lord of the Welsh Marches. It was his dispute with Owain Glyndŵr over a piece of moorland called the common of Croisau that caused the latter's rebellion against King Henry IV of England. Margaret's father was taken prisoner by Glyndŵr in January 1402, and ransomed for the sum of 10,000 marks which was paid by King Henry. In September 1400, the town of Ruthin had been razed to the ground by the Welsh in revenge for the destruction of Glyndŵr's manor of Sycharth by Grey and his men, however, the castle was left standing, and its inhabitants unharmed.