Lady Mary Stewart Peerage person ID=28234 Parents Lady Janet Kennedy Robert Stewart, 1st Earl of Orkney Children Agnes Gray Jane Gray Andrew Gray, 7th Lord Gray Lydia Gray Elizabeth Gray Helen Gray Siblings Henry Stewart, Master of Orkney John Stewart, Earl of Carrick Sir James Stewart Patrick Stewart, 2nd Earl of Orkney Elizabeth Stewart Katherine Stewart Robert Stewart Lady Jean Stewart James Stewart, 1st Laird of Greamsay Christian Stewart Partners Patrick Gray, 6th Lord Gray