Who married George Stewart, 9th Seigneur d'Aubigny?

Lord George Stewart (or Stuart), 9th Seigneur d'Aubigny (17 July 1618 – 23 October 1642) was an Anglo-Scottish nobleman of French descent and a third cousin of King Charles I of England. He supported that king during the Civil War as a Royalist commander and was killed, aged 24, at the Battle of Edgehill in 1642.