Mary Stewart, Viscountess Mountjoy

Mary Stewart, Viscountess Mountjoy (1654–1720), formerly the Honourable Mary Coote, was the wife of William Stewart, 1st Viscount Mountjoy. She was the daughter of Richard Coote, 1st Baron Coote (1620-1683), and his wife, the former Mary St George. Her brother was Richard Coote, 1st Earl of Bellomont.
The viscount and viscountess had six sons and two daughters, including: