Robert Sinclair (1480-1507) (1480–1507) Parents Marjory Sutherland William Sinclair, 1st Earl of Caithness Children Elizabeth Sinclair Siblings Alexander Sinclair Arthur Sinclair George Sinclair Eleanor Sinclair Oliver St Clair, 12th Baron of Roslin William Sinclair, 2nd Earl of Caithness Catherine Sinclair Mariot Sinclair Susan Sinclair Katherine Sinclair Lady Elizabeth Sinclair William Sinclair, 3rd Lord Sinclair Sir David Sinclair