Margaret_Douglas--Queen_of_England_Elizabeth_I

Margaret Douglas, Countess of Lennox (8 October 1515 – 7 March 1578), was the daughter of the Scottish queen dowager Margaret Tudor and her second husband Archibald Douglas, 6th Earl of Angus, and thus the granddaughter of Henry VII of England. She was the grandmother of James VI and I.
In her youth she was high in the favour of her uncle, Henry VIII, but later incurred his anger for her unauthorised engagement to Lord Thomas Howard, who died imprisoned in the Tower of London in 1537. In 1544, she married Scottish nobleman Matthew Stewart, 4th Earl of Lennox. Her son Henry Stuart, Lord Darnley, married her niece Mary, Queen of Scots, and was the father of James VI and I.