Matthew Stewart, 4th Earl of Lennox (1516–1571), was the father of Henry Stuart, Lord Darnley (1545–1567) (later created Duke of Albany), better known as "Lord Darnley", a courtesy title, his father holding that title, who became the husband of Mary, Queen of Scots, and thus father of King James VI and I (1566–1625).
[1] Together with Lord Ruthven and others, Darnley openly murdered David Rizzio in Holyrood Palace in March 1566.
On 10 February 1567, Darnley died when his residence was destroyed by a bomb whilst his wife, Mary, Queen of Scots, attended a party for the wedding of her servant Bastian Pagez.
Darnley and his groom were found dead at the scene with marks on their necks (possibly they were strangled) and next to them lay a knife with which they had been stabbed.
The suspected murderer, James Hepburn, 4th Earl of Bothwell, married Mary one month after he was acquitted and released from jail.