Who married William Monson, 1st Viscount Monson?

Margaret Stuart (or Stewart) (c. 1591 – 4 August 1639), Scottish aristocrat and courtier in England. She served as lady-in-waiting to the queen consort of England, Anne of Denmark. She was the daughter of James Stewart, 2nd Earl of Moray, and Elizabeth Stuart, 2nd Countess of Moray. The sailor and patron of Ben Jonson, Sir Frances Stuart was her brother.