Thom's Irish Who's Who/O


 * ../O'Brien, Baroness Annie/
 * ../O'Brien, Christopher Michael/
 * ../O'Brien, His Honour Judge Daniel Joseph/
 * ../O'Brien, Dermod/
 * ../O'Brien, Hon. Donough Edward Foster/
 * ../O'Brien, Hon. Donough/


 * ../O'Brien, Edmond Lyons/
 * ../O'Brien, Hon. Edward Donough/
 * ../O'Brien, Colonel Eoghan/
 * ../O'Brien, George/
 * ../O'Brien, Capt. Hon. Henry Barnaby/
 * ../O'Brien, John Robert/
 * ../O'Brien, Kendal Edmund/
 * ../O'Brien, Hon. Lucius Murrough/
 * ../O'Brien, Lt.-Col. Hon. Murrough/
 * ../O'Brien, Hon. Phadrig Luciue Ambrose/
 * ../O'Brien, Sir Timothy Carew/
 * ../O'Brien, Torlogh/


 * ../O'Brien, Alderman William/
 * ../O'Brien, William/
 * ../O'Brien, Hon. William Henry Robert Ernest Turlough/
 * ../O'Byrne, Count John Edward Gerald O'Byrne/
 * ../O'Callaghan, Daniel/
 * ../O'Callaghan, Mrs. Kate/


 * ../O'Callaghan-Westropp, Col. George/
 * ../O'Carroll, Joseph Francis/
 * ../O'Ceallaigh, Sean T./
 * ../O'Connell, Daniel Charles/
 * ../O'Connell, Rev. Frederic Wm./
 * ../O'Connell, Major James Ross/


 * ../O'Connell, John Joseph/
 * ../O'Connell, Sir John Robert/
 * ../O'Connell, Capt. Sir Maurice James Arthur/
 * ../O'Connell, Sir Peter Reilly/
 * ../O'Connell, Lady Mary Pauline/
 * ../O'Connell, Thomas Joseph/
 * ../O'Connor, Arthur John/
 * ../O'Connor, Right Hon. Charles Andrew/
 * ../O'Connor, George Richard/
 * ../O'Connor, Right Hon. James/


 * ../O'Connor, Lieut.-Col. Patrick Fenelon/
 * ../O'Connor, Thomas Power/
 * ../O'Conor, Charles Hugh/
 * ../O'Conor, Edmond/
 * ../O'Conor, Lady Minna Margaret/
 * ../O'Conor Don, The, Owen Phelim O'Conor/
 * ../O'Doherty, Eileen/
 * ../O'Doherty, James Edward/
 * ../O'Doherty, Joseph/
 * ../O'Doherty, Philip/


 * ../O'Doherty, Most Rev. Thomas/
 * ../O'Donnell, Charles James/
 * ../O'Donnell, Elliot/
 * ../O'Donnell, John/
 * ../O'Donnell, Rev. Michael J./
 * ../O'Donnell, Thomas (M.P. West Kerry)/
 * ../O'Donnell, Thomas (T.D. Sligo–Mayo East)/
 * ../O'Donnell, Lieut.-Gen. Sir Thomas Joseph/
 * ../O'Donoghoe, Sir James/
 * ../O'Donoghue, Geoffrey (The O'Donoghue of the Glens)/


 * ../O'Donoghue, Tadhg/
 * ../O'Donoghue, Thomas/
 * ../O'Donovan, Fred/
 * ../O'Donovan, The, Morgan William O'Donovan/
 * ../O'Dowd, John/


 * ../O'Duffy, General Owen/
 * ../O'Dwyer, Sir Michael Francis/
 * ../O'Dwyer, Robert/
 * ../O'Farrell, Charles Richard/
 * ../O'Farrell, Sir Edward/
 * ../O'Farrell, Surgeon-General Thomas/
 * ../O'Farrell, Thomas T./


 * ../O'Farrelly, Miss Agnes/
 * ../O'Ferrall, John Forbes/
 * ../O'Ferrall, Dominic More-/
 * ../O'Flaherty, Samuel/
 * ../O'Flanagan, Reverend Michael/
 * ../Ogilby, Lt.-Col. Robert James Leslie/
 * ../O'Gorman, Col. Nicholas Purcell O'Gorman (The O'Gorman)/
 * ../O'Grady, Guillamore/
 * ../O'Grady, Major Hugh Hamon Massy/
 * ../O'Grady, William De Rienzi O'Grady (The O'Grady)/
 * ../O'Hara, Arthur Cooper/
 * ../O'Hara, Charles Kean/


 * ../O'Hara, Lt.-Col. Erril Robert/
 * ../O'Hara, Right Rev. Henry Stewart/
 * ../O'Hara, Colonel James/
 * ../O'Hara, Major Patrick Henry Augustus/
 * ../O'Higgins, Brian/
 * ../O'Keeffe, Major-Gen. Sir Manus William/
 * ../O'Keeffe, Patrick/
 * ../O'Keeffe, Stephen Charles Martin Lanigan-/
 * ../O'Kelly, De Gallagh et Tycooly, Count Gerald Edward/
 * ../O'Kelly, Capt. Henry Kane/
 * ../O'Kelly, John Thomas/


 * ../O'Kelly, Sean Joseph (Sceilig)/
 * ../O'Kelly, Rev. Thomas/
 * ../O'Kennedy, Very Rev. Canon Richard/
 * ../O'Leary, Daniel Henry/
 * ../O'Loghlen, Sir Michael/
 * ../O'Loingsigh, Fionan/
 * ../O'Mahony, Sean/
 * ../O'Mahony, Pierce Charles de Lacy O'Mahony (The O'Mahony)/
 * ../O'Maille, Prof. Tomas/
 * ../O'Maille, Padraic/


 * ../O'Malley, Ellen/
 * ../O'Malley-Keyes, Major Middleton/
 * ../O'Mara, James/
 * ../O'Mara, Joseph/
 * ../O'Mara, Alderman Stephen Mary/


 * ../O'Meagher, Col. John Kevin/
 * ../O h-Aodha, Padraig/
 * ../O'Neill, Baron/
 * ../O'Neill, Major Edward Michael/
 * ../O'Neill, Rev. George/
 * ../O'Neill, Rev. John/
 * ../O'Neill, Rev. Patrick/
 * ../O'Neill, Right Hon. Laurence/


 * ../O'Neill, Maire/
 * ../O'Neill, Patrick/
 * ../O'Neill, Rt. Hon. R. W. Hugh/
 * ../O'Neill, Colonel William Henry Slingsby/
 * ../O'Neill-Power, Captain John Joseph/
 * ../O'Nolan, Rev. Gerald/
 * ../O'Rahilly, Alfred/
 * ../O'Rahilly, Thomas F./
 * ../Oranmore and Browne, Baron/


 * ../O'Reilly, Captain Ferdinand Hugh Luke de la Pere/
 * ../O'Reilly, Lt.-Col. Charles Myles/
 * ../O'Reilly, William Joseph/
 * ../Orme, Christopher Guy/
 * ../Ormonde, Marquess of/
 * ../Ormsby, Anthony/
 * ../Ormsby, Colonel Gilbert John Anthony/
 * ../Ormsby, Lieut.-Col. Thomas/


 * ../Ormsby, Sir Lambert Hepenstal/
 * ../Ormsby-Gore, Hon. William George Arthur/
 * ../O'Rorke, Charles Trench/
 * ../Orpen, Goddard Henry/
 * ../Orpen, R. Caulfeild/
 * ../Orpen, Major Sir William/


 * ../Orr, Very Rev. John/
 * ../Orr, Major Michael Harrison/
 * ../Orr, Thomas/
 * ../Orr, William M'Fadden/
 * ../Osborne, Rev. James Denham/
 * ../Osborne, His Honor Judge Robert Ernest/
 * ../O'Shannon, Cathal/
 * ../O'Shaughnessy, M. M./
 * ../O'Shaughnessy, Patrick Joseph/
 * ../O'Shaughnessy, Richard/


 * ../O'Shaughnessy, The Right Hon. Thomas Lopdell/
 * ../O'Shaunessy, George Francis/
 * ../O'Shea, Sir Henry/
 * ../O'Shee, Col. George Iver Patrick Poer-/
 * ../O'Shee, James John/
 * ../O'Shee, Lieut.-Col. Richard Alfred Poer-/
 * ../Ossory, Bishop of/
 * ../Ossory, Ferns And Leighlin, Bishop of/
 * ../Ossory, Earl of/
 * ../O'Sullivan, Eugene/
 * ../O'Sullivan, Gerald/


 * ../O'Sullivan, Professor John M./
 * ../O'Sullivan, Timothy/
 * ../O'Sullivan-Beare, Daniel Robert/
 * ../Oulton, George Nugent/
 * ../Ovenden, Charles Thomas/
 * ../Ovens, Brig.-Gen. Robert Montgomery/
 * ../Owen-Lewis, Lieut.-Col. Arthur Francis/
 * ../Oxmantown, Lord/