Who married Robert Stewart, 1st Earl of March?

Robert Stewart, 1st Earl of Lennox then 1st Earl of March (c. 1522 – 29 March 1586) was a Scottish nobleman of the family of Stewart of Darnley.

Elizabeth Stewart, Countess of Arran (c. 1554–1590) was a Scottish noblewoman and political intriguer. Several accounts of her actions and ambition were written by her political enemies.