Donough Acheson O'Brien (1780-1847) (1780–1847) Parents Anne ffrench Sir Lucius O'Brien, 3rd Baronet Children unknown daughter O'Brien unknown daughter O'Brien Siblings Charlotte Sophia O'Brien Sir Edward O'Brien, 4th Baronet Katherine O'Brien Nicola Maria O'Brien Anne Maria O'Brien Robert O'Brien Lucius O'Brien Partners Marianne Lydia Semple