Lady Isabel Stewart Peerage person ID=518511 Parents Eleanor Sinclair John Stewart, 1st Earl of Atholl Children William Robertson, 10th of Struan, 6th Chief of Clan Donnachaidh Siblings Lady Elizabeth Stewart Lady Jean Stewart Lady Margaret Stewart Lady Elspeth Stewart Lady Marjory Stewart Lady Janet Stewart Elizabeth Stewart Lady Elizabeth Stewart John Stewart, 2nd Earl of Atholl Lady Jean Stewart Lady Catherine Stewart Andrew Stewart Partners Robert Robertson