Sir Donough O'Brien, 1st Baronet Irish politician (1642–1717) Parents Máire Rua O'Brien Connor McDonogh O'Brien Children Elizabeth O'Brien Lucius O'Brien Henry O'Brien Honora O'Brien Siblings Honora O'Brien William O'Neylane unknown son O'Brien Teig O'Brien unknown son O'Brien Slany O'Brien Mary O'Brien Partners Lucia Hamilton Elizabeth Deane