Elizabeth Douglas Peerage person ID=638409 (b. 1600) Parents Elizabeth Douglas of Ivile Sir Robert Douglas of Blackerstone Children unknown daughter Sinclair George Sinclair Elizabeth Sinclair Sir John Sinclair of Longformacus, 2nd Bt. unknown daughter Sinclair Sir Archibald Sinclair Margaret Sinclair Partners Sir Robert Sinclair of Longformacus, 1st Bt.