Who was the mother of XXX?
John Bowes, 10th Earl of Strathmore and Kinghorne
John Bowes, 10th Earl of Strathmore and Kinghorne (14 April 1769 -- 3 July 1820) was the eldest son of John Bowes, 9th Earl of Strathmore and Kinghorne and Mary Bowes, Countess of Strathmore and Kinghorne.
Mary Bowes, Countess of Strathmore and Kinghorne