Harriet Stewart noblewoman (d. 1788) Parents Catherine Cochrane Alexander Stewart, 6th Earl of Galloway Children Lord Archibald Hamilton Alexander Hamilton, 10th Duke of Hamilton Charlotte St Maur, Countess of Somerset Anne Hamilton Lady Susan Hamilton Siblings John Stewart, 7th Earl of Galloway Susanna Leveson-Gower, Marchioness of Stafford Keith Stewart 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 Archibald Hamilton, 9th Duke of Hamilton