Marion Sinclair Peerage person ID=538487 (b. 1690) Parents John Sinclair of Stevenson, younger Isabel Boyd Children James Cockburn Helen Cockburn Sir Alexander Cockburn, 6th Baronet Sir Alexander Cockburn of Langton the Younger Elizabeth Cockburn Siblings Sir John Sinclair of Stevenson, 2nd Bt. Sir Robert Sinclair Robert Grierson of Lag Nicola Grierson Partners Sir Archibald Cockburn, 4th Baronet