Frances Stewart (1750-1833) nee Pratt, 2nd wife of 1st Marquess of Londonderry (1750–1833) Parents Elizabeth Jeffreys Charles Pratt, 1st Earl Camden Children Charles Vane, 3rd Marquess of Londonderry Lady Georgiana Stewart Octavia Stewart Lady Selina Stewart Lady Emily Stewart Lady Caroline Stewart Frances Stewart Lady Selina Stewart Lady Matilda Stewart Siblings John Pratt, 1st Marquess Camden Lady Sarah Pratt Lady Elizabeth Pratt Lady Jane Pratt unknown daughter Pratt Partners Robert Stewart, 1st Marquess of Londonderry
