Susanna Leveson-Gower, Marchioness of Stafford politician (1743–1805) Parents Catherine Cochrane Alexander Stewart, 6th Earl of Galloway Children Granville Leveson-Gower, 1st Earl Granville Georgiana Leveson-Gower Charlotte Leveson-Gower Susan Leveson-Gower Siblings Keith Stewart Harriet Stewart John Stewart, 7th Earl of Galloway 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 Granville Leveson-Gower, 1st Marquess of Stafford