Paris - Île-de-France
- North
- Norton
- Nosjean
- Not
- Notter
- Nou
- Nouailhac
- Noudelmann
- Noufal
- Nouhaud
- Nouioui
- Nourrisson
- Nouvelot
- Nouvian
- Novarina
- Novikova
- Nowacki
- Noziere
- Nozieres
- Nseir
- Ntsama
- Nudelman
- Nugier
- Nur
- Nusbaumer
- Nuytens
- Nyam
- Négrier
- O Leary
- O Neil
- O Neill
- O'byrne
- O'donnell
- O'hana
- O'neil
- O'sullivan
- Obedia
- Obeniche
- Oberhauser
- Oberti
- Oble
- Oblet
- Oblin
- Oboeuf
- Occolier
- Odent
- Odet
- Odiot
- Odonnat
- Ody
- Offenstadt
- Offner
- Offredo
- Ofman
- Ogawa
- Ogee
- Ogereau
- Ogé
- Oiffer
- Oiknin
- Ojalvo
- Okou
- Oktay
- Olariu
- Olivari
- Oliveras
- Oliveros
- Olivesi
- Olmedo
- Olmi
- Olsen
- Olympie
- Om
- Omrane
- Onimus
- Opigez
- Opoczynski
- Oppermann
- Oranger
- Orban
- Ordinaire
- Ordonneau
- Oren
- Orenstein
- Orieux
- Orinel
- Orliaguet
- Orlik
- Orlinski
- Orphelin
- Orr
- Orsetti
- Orsi
- Orta
- Ortmans
- Ortola
- Ortole
- Orts
- Osawa
- Osborne
