Alicja Justyna Osak till Marte Oseid
- Alicja Justyna Osak - Patience Osakve
- Eric Chika Bye Osakwe - Anette Osaland
- Anja Osaland - Bente Osaland
- Bente Grimstad Osaland - Einar Osaland
- Eivind Osaland - Even Osaland
- Geir Helge Osaland - Gunvald Osaland
- Hans Petter Osaland - Inger Helen Osaland
- Ingvild Berge Osaland - Jostein Osaland
- Jostein Osaland - Liv Osaland
- Magne Osaland - Oddny Osaland
- Oddrun Bøe Osaland - Rasmus Osaland
- Reidun Osaland - Steinar Osaland
- Stig Osaland - Torje Vassbø Osaland
- Torleif Osaland - Muhammad Ali Osama
- Rija Osama - May-Britt Osan
- Roy-Vidar Osan - John Vivian Osapkmwan
- Friday Egbe Osarenkhoe - Joy Osasenaga
- Etinosa Blessing Osasere - Osas Osayande
- Marit Favour Osaze - Eivind Osbak
- Hans Christian Osbak - Tor Arne Osbak
- Unni Osbak - Bjørn Hugo Osbakk
- Camilla Osbakk - Håkon Frits Osbakk
- Ida Marie Osbakk - Karin Osbakk
- Karin Marie Osbakk - Ole Edgar Osbakk
- Raymond Edgar Osbakk - Thea Marlen Osbakk
- Therese Kristin Osbakk - Mebrahtu Osbazghi
- Sara Madeleine Osbeck - Bente Steinsvik Osberg
- Camilla Osberg - Elisabeth Osberg
- Espen Osberg - Hege Osberg
- Helge Osberg - Jan Erik Osberg
- Jan Otto Osberg - Jorunn Osberg
- Juliane Myrmo Osberg - Kenneth Osberg
- Lene Osberg - Olaug Steinsvik Osberg
- Otto Osberg - Silje Osberg
- Siren Osberg - Tone-Britt Buanes Osberg
- Tor Bjørn Andresen Osberg - Anneke Osborg
- Arnar Osborg - Erlend Osborg
- Grethe Osborg - Jan Arve Osborg
- Kari Anne Osborg - Odd-Jarle Osborg
- Per Arne Osborg - Thinken Røsvik Osborg
- Torunn Osborg - Alan James Osborne
- Anne Brettingen Osborne - Janet Denise Osborne
- Janet Denise Osborne - Judith Osborne-Egeland
- Elin Sofia Oscander - Bente Øwre Oscarsen
- Bjørn Einar Oscarsen - Wenche Oscarsen
- Sonny Waldemar Oscarson - Leif Oscarsson
- Mattias Oscarsson - Cora Oschmann
- Frank Oschmann - Ann Katrin Alnes Osdal
- Arnfinn Kenneth Osdal - Bjørn Ødegaard Osdal
- Bård Osdal - Geir Osdal
- Gunn Kristin Osdal - Hjalmar Osdal
- Hulda Osdal - Jan Kåre Osdal
- Jarle Osdal - Kåre Osdal
- Lars Helge Osdal - Marianne Osdal
- Martine Osdal - Per Jan Osdal
- Ragnar Didrik Osdal - Silje Seltveit Osdal
- Sissel Osdal - Stig Osdal
- Storm Severin Osdal - Torvald Osdal
- Vilde Lund Osdal - Bredo Osdalen
- Charlotte Osdalen - Thorleif Osdalen
- Torleif Osdalen - Aase Ose
- Aleksander Nilsen Ose - Anita Ose
- Ann Karin Wendelborg Ose - Anne-Marthe Due Ose
- Arne Olai Ose - Bente Ose
- Berit Ose - Catharina Ose
- Christine Due Ose - Einar Ose
- Eirunn Ose - Elisabeth Ose
- Elisabeth Berild Ose - Geir Arne Ose
- Gerhard Myrseth Ose - Gunnhild Norstrand Ose
- Gunstein Ose - Heidi Ose
- Heidi Theresa Ose - Inge Ose
- Ingeline Bjørdal Ose - Janne Barstad Ose
- Janne Lise Ose - Karin Ose
- Karin Anne Ose - Kjetil Ose
- Knut Ose - Lars Olav Ose
- Lars Otto Lofthus Ose - Lourdes Rinono Ose
- Magnar Ose - Martine Myrseth Ose
- Mathias Berild Ose - Oddmund Ose
- Oddvin Ose - Petter Ose
- Petter Ose - Sara Rhiannon Aytch Ose
- Sigmund Ose - Stein Jarle Ose
- Steinar Ose - Svein Johann Ose
- Svein Johann Ose - Tone Johanne Førsund Ose
- Tor Steinar Ose - Turid Ose
- Rønnaug Ose Velle - Karen Ose-Velle
- Mirjam Ose-Velle - Erik Oseassen
- Ernst Ivar Oseassen - Åse Oseassen
- Camilla Osebakken - Kristina Tveit Osebakken
- Kåre Osebakken - Sveinung Osebakken
- Sverre Osebakken - Anne Christine Oseberg
- Anne Grete Ervik Oseberg - Egil Reidar Oseberg
- Ella Oseberg - Gunnar Oseberg
- Harald Oseberg - Jarle Oseberg
- Joachim Oseberg - Leikny Johanne Oseberg
- Line Helene Oseberg - Ove Oseberg
- Per Oseberg - Sissel Oseberg
- Siv Oseberg - Torkil Strand Oseberg
- Trond-Otto Oseberg - Maria Teresa Torres Osegueda
- Marita Cherrie S. Oseguera - E Osei
- Ernest Amoh Osei - Kwaku Osei Oviasu
- Richard Kofi Osei - Marte Oseid