Erik Ore till Ellen Ormberg
- Erik Ore - Irene Ore
- Jan B Ore - Kjetil Ore
- Knut M Ore - Odd Gunnar Ore
- Odd Gunnar Ore - Stine Ore
- Stine Ore - Øystein Ore
- Øystein Mikal Ore - Kari Oreberg
- Kristin Oreberg - Arne Orebråten
- Astrid H Orebråten - Inger Orebråten
- Jan August Orebråten - Reidun Orebråten
- Robert Orebråten - Genadisus Orechovas
- Egil Oredalen - Harald Oredalen
- Hilde Oredalen - Marte Oredalen
- Martine Oredalen - Tom Halvor Oredalen
- Tone Jøran Oredalen - Elin Jolene Christina Oredsson
- Isabella Oredsson - Daniel Nikolai Orefellen
- Eline Orefellen - Knut Orefellen
- Linn Kristin Orefellen - Synnøve Orefellen
- Therese Marie Orefellen - Maria Ines Mateo Oreiro
- Adriana Orejarena Abaunza - Kate May Orekås
- Paul Orekås - Frode Orekåsa
- Grethe Elisabeth Orekåsa - Kine Orekåsa
- Olav Orekåsa - Jan Orel
- Frøydis Oreld - Trude Oreld
- Gerd Ranveig Oreli - Jessica Andrea Orellana
- Luiscarrasco Orellana - Veronica Orellana
- Villa Luis Alberto Orellana - Kristin Oremo
- Laila Oremo - Vera Kristine Oremo
- Victoria Elisabeth Oremo - Barbara Orenkiewicz
- Klaudia Orenkiewicz - Raplii Orersandar
- Anders Orerød - Fredrik Orerød
- Geir Endre Orerød - Johan Orerød
- Johnny Orerød - Sissel Orerød
- Solfrid Orerød - Øystein Orerød
- Anna Oreshkova - Ragnar Ivar Orestad
- Ragnhild Orestil - Vibeke Oretorp
- Oddvar Sofus Oreviken - Jürgen Orf
- Kjell Chr Orf - Roy Ottar Orf-Madland
- Kristos Orfanidis - Dietrich Orfert
- Aleksandra Orfin - Frank Yngvar Orfjell
- Georg Verner Orfjell - Per Orfjell
- Ruth Helen Orfjell - Studorg Org
- Michal Orgacki - Thomas Orgeolet
- Jean-Luc Serge Claude Orgeret - Magnhild Orgland
- Magnhild Orgland - Christopher Orhagen
- Gerd Orhagen - Tom Ole Orhagen
- Tom Ole Orhagen - Alfhild Marie Orheim
- Alv Orheim - Aud Sissel Orheim
- Bente Orheim - Christian Orheim
- Eirik Orheim - Gjertrud Olga Orheim
- Gjøa Orheim - Ingvild Kristine Orheim
- Jacob Orheim - Kine Orheim
- Kjell Arild Orheim - Liv Svardal Orheim
- Lovisa Eva Orheim - Monica Orheim
- Nikolai Orheim - Petra Marta Orheim
- Pål Kristen Orheim - Steinar Orheim
- Svein Orheim - Tove Orheim
- Trond Helge Orheim - Edvin Orholm
- Edvin Birger Orholm - Hildegunn Orholm
- Jan Gunnar Orholm - Rolf Inge Orholm
- Sigmund Orholm - Ketrin Orholt
- Morten Orholt - Katoray Oria
- Katoray Oria - Mohamed Oriby
- Zakaria Oriby - Joel Orina
- Edgar Orinz - Junustian Oripoy
- Lubos Orisek - Salman Oriyakhel
- Salman Oriyakhel - Anna Orkelbog
- Anne Marie Orkelbog - Erik Orkelbog
- Erling Ivar Orkelbog - Kim Andre Orkelbog
- Maria Lisa Victoria Orkelbog - Stian André Orkelbog
- Stig Vidar Orkelbog - Vidar Orkelbog
- Vidar Orkelbog - Camilla Orkås
- Grethe Orkås - Algimantas Orlanas
- Nils David Mikael Orlander - Swing Orlando
- Tommaso Antonio Orlando - Marta Orleanski
- Deividas Orleckas - Marit Orli
- Nora Irene Orli - Kristina Mønness Orliczky
- Øivind Orlie - Gry Monika Orlien
- Harald Orlien - Matias Orlien
- Morten Orlien - Marek Jerzy Orlik
- Monika Katarzyna Orlik - Zbigniew Marek Orlikowski
- Anna Aurora Orlin - Kyrre Orlin
- Petter Orlin - Ditti Orlishta
- Duli Orlishta - Vasfije Orlishta
- Vlora Orlishta - Gunnar Orloff
- Jørgen Orloff - Igor Orlov
- Maksim Orlov - Lina Orlova
- Natalia Orlova - Lauras Orlovas
- Olegas Orlovas - Agnieszka Orlowska
- Aleksandra Orlowska - Joanna Anna Orlowska
- Jolanta Orlowska - Artur Orlowski
- Artur Orlowski - Jacek Tomasz Orlowski
- Karol Jan Orlowski - Marek Orlowski
- Mathias Edward Orlowski - Tomasz Orlowski
- Tomasz Miroslaw Orlowski - Odd Arnstein Orlund
- Momo Orly - Bente Grønn Ormaasen
- Bjørn Ormaasen - Eva Margrethe Ormaasen
- Evelyn Ormaasen - Magnus Ormaasen
- Mari Ormaasen - Terje Harald Ormaasen
- Thomas Ormaasen - Enes Orman
- Grethe Orman - Bror Ormann
- Einar Ormann - Ellen Ormberg