Katherine Stewart Peerage person ID=593762 (1562–1631) Parents Lady Janet Kennedy Patrick Stewart, 2nd Earl of Orkney Robert Stewart, 1st Earl of Orkney Children John Sinclair Elizabeth Sinclair Jean Sinclair Siblings Henry Stewart, Master of Orkney John Stewart, Earl of Carrick Sir James Stewart Elizabeth Stewart Lady Mary Stewart Robert Stewart Lady Jean Stewart James Stewart, 1st Laird of Greamsay Christian Stewart Partners John Sinclair of Ulbster