Esmé Stewart, 3rd Duke of Lennox (1579 – 30 July 1624), KG, 7th Seigneur d'Aubigny, lord of the Manor of Cobham, Kent, was a Scottish nobleman and through their paternal lines was a second cousin of King James VI of Scotland and I of England.
He was the younger son of Esmé Stewart, 1st Duke of Lennox (1542–1583), a Frenchman of Scottish ancestry and a favourite of King James VI of Scotland (of whose father, Henry Stewart, Lord Darnley, he was a first cousin), by his wife Catherine de Balsac (died after 1630), a daughter of Guillaume de Balsac, Sieur d'Entragues, by his wife Louise d'Humières.
[3] He had become the 7th Seigneur d'Aubigny in France when his elder brother surrendered the title following their father's death.
[4][5] On 9 February 1608, he performed in the masque The Hue and Cry After Cupid at Whitehall Palace as a sign of the zodiac, to celebrate the wedding of John Ramsay, Viscount Haddington to Elizabeth Radclyffe.
In 1609, he married Katherine Clifton, 2nd Baroness Clifton, by whom he had eleven children, third cousins of King Charles I, for whom many of them fought and died in the English Civil War: He died on 30 July 1624 at Kirby Hall, Northamptonshire, of the "spotted ague".