Mary St. Clair (died 1606) (d. 1606) Parents Sir William St. Clair of Hermanstoun Sibyl Cockburn Children Alexander Makgill James Makgill, 1st Viscount of Oxfuird John Makgill Elizabeth Makgill Siblings William St. Clair George St. Clair Sir John St. Clair of Hermanstoun Partners David Makgill