Keith Stewart politician (1739–1795) Parents Catherine Cochrane Alexander Stewart, 6th Earl of Galloway Children James Alexander Stewart-Mackenzie Leveson Douglas Stewart Siblings Harriet Stewart John Stewart, 7th Earl of Galloway Susanna Leveson-Gower, Marchioness of Stafford William Stewart George Stewart Lady Margaret Stewart Euphemia Stewart Lady Catherine Stewart Lady Charlotte Stewart John Stewart James Stewart Lady Mary Stewart Alexander Stewart Partners Georgiana Isabella d'Aguilar