Sir John Sinclair of Longformacus, 2nd Bt. Peerage person ID=637820 Parents Elizabeth Douglas Sir Robert Sinclair of Longformacus, 1st Bt. Children Sir Robert Sinclair of Longformacus, 3rd Bt. Siblings unknown daughter Sinclair George Sinclair Sir Archibald Sinclair Elizabeth Sinclair unknown daughter Sinclair Margaret Sinclair Anne Sinclair Jean Sinclair Partners Jean Towers