The Lastnames
- Orkin [1]
- Orleanskiy [1]
- Orlenev [1]
- Orlikovskiy [1]
- Orlinskiy [1]
- Orlov [31]
- Orlov (Chesmenskiy) [1]
- Orlov-Davydov [1]
- Orlova [8]
- Orlovich [1]
- Orlovskiy [8]
- Orlovsky [1]
- Orlyk [2]
- Ormaechea [1]
- Ormando [1]
- Ormandy [1]
- Orme [1]
- Ormond [2]
- Ormondi [1]
- Ormrod [1]
- Ormsby [1]
- Ornano [1]
- Ornshtein [1]
- Orobets [1]
- Orochko [1]
- Oros [1]
- Orovan [1]
- Orozco [2]
- Orpen [1]
- Orpik [1]
- Orr [5]
- Orsal [1]
- Orshanskiy [1]
- Orsi [1]
- Orsini [1]
- Orskaya [1]
- Orsolini [1]
- Orstad [1]
- Orta [1]
- Ortega [6]
- Ortega-i-Gasset [1]
- Ortenberg [2]
- Ortiz [5]
- Orton [4]
- Orurk [1]
- Orvid [1]
- Orwell [1]
- Oryema [1]
- Orzelskaya [1]
- Orzeszkowa [1]
- Orzhyh [1]
- Orzua y Vela [1]
- Orzul [1]
- Osadchaya [1]
- Osadchiev [1]
- Osadchiy [4]
- Osaka [1]
- Osakwe [1]
- Osala [1]
- Osamu [3]
- Osaulenko [2]
- Osborne DuPont [1]
- Osborne-Paradis [1]
- Osbourne [4]
- Oseary [1]
- Oseeva [1]
- Oseevskiy [1]
- Osenev [1]
- Osenton [1]
- Oserov [1]
- Osgood [1]
- Oshanin [3]
- Oshurkov [1]
- Osiashvili [1]
- Osiko [1]
- Osin [1]
- Osinnik [1]
- Osinov [1]
- Osintsev [1]
- Osipenco [1]
- Osipenko [3]
- Osipo [1]
- Osipov [11]
- Osipova [6]
- Oskalenko [1]
- Oskanian [1]
- Oskanov [1]
- Oskin [2]
- Oskina [1]
- Oskolkov [2]
- Oskolkov-Tsentsiper [1]
- Oslavskiy [1]
- Oslon [1]
- Osmachka [1]
- Osmaev [1]
- Osmanagic [1]
- Osmann [1]
- Osment [2]
- Osmolovskaya [2]
- Osmomysl [1]
- Osmond [3]
- Osmuhin [1]
- Osokin [1]
- Osorgin [1]
- Osorio [1]
- Osovtsov [1]
- Ospina [1]
- Ossovskiy [1]
- Ossovskyi [1]
- Ostaev [1]
- Ostahenko [1]
- Ostalskiy [1]
- Ostanina [1]
- Ostapchuk [1]
- Ostapenko [6]
- Ostapenya [1]
- Ostberg [1]
- Osten [1]
- Osten-Saken [1]
- Oster [2]
- Osterman [2]
- Osterman-Tolstoy [1]
- Ostermeier [1]
- Osterreich [2]
- Osti [1]
- Ostling [1]
- Ostoumov [1]
- Ostrenkova [1]
- Ostretsov [1]
- Ostrobrod [1]
- Ostrogorsokij [1]
- Ostrogorsokiy [1]
- Ostrogradskiy [1]
- Ostrom [1]
- Ostrosky [1]
- Ostrosky Stern [1]
- Ostrouhov [1]
- Ostroumov [1]
- Ostroumova [1]
- Ostroumova-Lebedeva [1]
- Ostrovidov [1]
- Ostrovoy [1]
- Ostrovskaya [2]
- Ostrovskiy [5]
- Ostrum [1]
- Ostryakov [1]
- Ostuzhev [1]
- Ostwald [1]
- Osyanin [1]
- Osygi [1]
- Oszvald [1]
- Otamendi [1]
- Otarsultanov [1]
- Otash [1]
- Otayf [1]
- Otcenas [1]
- Otcenasek [1]
- Otellini [1]
- Oteri [1]
- Otero [1]
- Otieva [1]
- Otkalenko [1]
- Otkur [1]
- Ototake [1]
- Otpushennikov [1]
- Otradnaya [1]
- Otradnov [1]
- Otroshenko [1]
- Ots [1]
- Otsuka [1]
- Ott [1]
- Ottaviano [1]
- Otter [1]
- Ottey [1]
- Ottke [1]
- Otunbaeva [1]
- Otway [2]
- Ouanna [1]
- Ouchi [1]
- Oudin [1]
- Ouellet [1]
- Ouellette [1]
- Oughtred [1]
- Oumarou [1]
- Oursler [1]
- Out [1]
- Outen [1]
- Outhwaite [1]
- Outinen [1]
- Outlaw [1]
- Outy [1]
- Ovalov [1]
- Ovander [1]
- Ovanisian [1]
- Ovanissyan [1]
- Ovcharenko [3]
- Ovcharov [2]
- Ovchinnikov [11]
- Ovchinnikova [3]
- Ovechkin [3]
- Ovechkina [1]
- Ovens [1]
- Overbek [1]
- Overbey [1]
- Overmars [1]
- Ovie [1]
- Oviedo [1]
- Ovitz [2]
- Ovodov [2]
- Ovsepyan [3]
- Ovshinsky [1]
- Ovsienko [1]
- Ovsoyan [1]
- Ovsyanikov [1]
- Ovsyanitskiy [1]
- Ovsyannikov [4]
- Ovsyannikova [1]
- Owens [10]
- Owenson [1]
- Owusu [1]
- Owusu-Abeyie [1]
- Oxenberg [1]
- Oxenham [1]
- Oxenstierna [1]
- Oxlade-Chamberlain [1]
- Oya [1]
- Oydanich [1]
- Oyserman [1]
- Oysher [1]
- Oystrah [2]
- Oz [2]
- Ozal [1]
- Ozann [1]
- Ozava [1]
- Ozawa [1]
- Ozawao [1]
- Ozbek [2]
- Ozcan [1]
- Ozcivit [1]
- Ozdoev [3]
- Ozegen [1]
- Ozep [1]
- Ozeretskovskiy [1]
- Ozerin [1]
- Ozernaya [1]
- Ozerov [4]
- Ozerova [1]
- Ozeryanskiy [1]
- Ozharovskiy [1]
- Ozhegov [1]
- Ozhero [1]
- Ozhie [1]
- Ozil [1]
- Ozilhan [1]
- Oznobishin [1]
- Ozokur [1]
- Ozolin [2]
- Ozolina [1]
- Ozolinsh [2]
- Ozolinya [1]
- Ozollapina [1]
- Ozon [1]
- Ozturk [1]
- Ozyegin [1]
- O'Banyon [1]
- O'Bara [1]
- O'Brien [7]
- O'Callaghan [2]
- O'Casey [1]
- O'Connell [2]
- O'Conner [1]
- O'Connor [12]
- O'Day [3]
- O'Dell [1]
- O'Donnell [5]
- O'Donoghue [2]
- O'Dowd [1]
- O'Driscoll [1]
- O'Grady [3]
- O'Hara [2]
- O'Hare [1]
- O'Hurley [1]
- O'Keefe [3]
- O'Keeffe [1]
- O'Kelly [1]
- O'Leary [1]
- O'Loughlin [1]
- O'Malley [2]
- O'Mara [1]
- O'Meara [1]
- O'Meyl [1]
- O'Neal [5]
- O'Neil [2]
- O'Neill [8]
- O'Pry [1]
- O'Quinn [1]
- O'Rahilly [1]
- O'Reilly [2]
- O'Riordan [1]
- O'Rourke [2]
- O'Sanches [1]
- O'Shaughnessy [1]
- O'Shea [1]
- O'Sullivan [1]
- O'Toole [2]
- O\'Brien [1]
- O\'Neill [1]
- P-Orridge [1]
- Paar [1]
- Paasikivi [1]
- Pabon [1]
- Pabst [1]
- Pacchierotti [1]
- Pace [2]
- Pacelli (Pius XII) [1]
- Pachard [1]
- Pacheco [1]
- Pacheko [1]
- Pachenko [1]
- Pachulia [1]
- Pacino [2]
- Pacioli [1]
- Paciotti [1]
- Packard [3]
- Packer [3]
- Packham [2]
- Packston [1]
- Pacolli [1]
- Pacome [1]
- Pacquiao [1]
- Padalecki [2]
- Padalka [1]
- Paddock [1]
- Pade [1]
- Paderewski [1]
- Padgett [1]
- Padilla [2]
- Padron [1]
- Padua [1]
- Padva [1]
- Paes [1]
- Paet [1]
- Paez [1]
- Paganini [1]
- Paganiny [1]
- Pagayev [1]
- Paglia [1]
- Pagliughi [1]
- Pagnol [1]
- Pahalchuk [1]
- Pahalina [1]
- Pahar [1]
- Pahlavi [3]
- Pahlke [1]
- Pahman [1]
- Pahmutova [1]
- Paholuk [1]
- Pahomov [5]
- Pahomova [4]
- Pahor [2]
- Pahtusov [1]
- Paice [1]
- Paichadze [1]
- Pain [2]
- Paine [1]
- Paire [1]
- Paisiello [1]
- Paisley [1]
- Pajol [1]
- Pakhomenko [1]
- Pakhomov [2]
- Paklin [1]
- Paksas [1]
- Pakula [1]
- Palacio [2]
- Palade [1]
- Paladino [1]
- Palaguta [1]
- Palahniuk [1]
- Palamarchuk [1]
- Palamas [1]
- Palance [1]
- Palaruan [1]
- Palazhchenko [1]
- Palchikov [2]
- Palchinskiy [1]
- Paleckis [1]
- Palees [1]
- Palek [1]
- Palen [4]
- Paleolog [1]
- Palepu [1]
- Palermino [1]
- Palermo [3]
- Paleshuky [1]
- Palestine [1]
- Palevsky [1]
- Paley [6]
- Palfrey [1]
- Paliashvili [2]