Olav Osa till Sissel Oseberg
- Olav Osa - Sigbjørn Bernhoft Osa
- Signy Osa - Terje Osa
- Tom Eide Osa - Wenche Osa
- Åse Marie Osa - Dmytro Osadchyi
- Lech Osadnik - Aleksei Osadtsi
- Kari Lillian Osae - Esi Lily Osafo
- Jeffter Kwaah Osafo - Joy Osagie
- Juliet Osagie - Blessing Osahon
- Nexhat Osaj - Lovis Osakobo
- Adriana Satie Osaku - Hilde Osaland - Stilfinneren
- Aina Honoré Osaland - Annelise Osaland
- Arnstein Osaland - Egil Osaland
- Eileiv Osaland - Else Anlaug Osaland
- Erik André Osaland - Gro Haukøy Osaland
- Gunhild Marie Wold Osaland - Helga Osaland
- Inge Osaland - Joakim Vassbø Osaland
- Johanna Nora Osaland - Knut Osaland
- Leidulf Berge Osaland - May Brit Harestad Osaland
- Morten Harestad Osaland - Per Ivar Osaland
- Per Ivar Osaland - Siv Merete Johansen Osaland
- Sofie Skjelbred Osaland - Sven Osaland
- Terje Osaland - Åshild Osaland
- Espen Vincent Osaland-Thompson - Kine Cecilie Berg Osan
- Kyrre Berg Osan - Peter Osankowski
- Cvan Howard Osantowski - Amadi Osas
- Amadi Osas - Odion Osawaye
- Helen Osawe - Sandra Osaren Osazuwa
- Anne Grethe Osbak - Ragnhild Osbak
- Siri Mikalsen Osbak - Bent Krister Osbakk
- Bjørg Kitty Osbakk - Frenk Morten Osbakk
- Hilde Kristin Eide Osbakk - Jon O Osbakk
- Kaia Mikalsen Osbakk - Merete Osbakk
- Oddny Jessie Osbakk - Sonja Osbakk
- Svein Are Osbakk - Kari Osbakken
- Mebrahtu Osbazghi - Atle Steinar Osberg
- Beate Osberg - Eirik Osberg
- Elin Osberg - Gunvor Marie Osberg
- Harald Osberg - Isabell Osberg
- Iselin Osberg - Johnny Osberg
- Jon Osberg - Karsten Osberg
- Karsten Osberg - Odd-Inge Osberg
- Ola Osberg - Signe Margrete Osberg
- Sigurd Haaland Osberg - Tobias Osberg
- Tom Osberg - Doug Osbo
- Andor Osborg - Eli Osborg
- Elin Osborg - Hilde Stinessen Osborg
- Håvard Hagen Osborg - Lars Erik Osborg
- Miriam Velle Osborg - Stein Olav Osborg
- Thinken Røsvik Osborg - Christopher David Osborn
- Todd Woodford Osborn - Gabriella Fosby Osborne
- Ian Gerald Osborne - Peter Osborne
- Robert Allen Osborne - Maria Lina Oscariz Blasco
- Alfhild Main Oscarsen - Therese Oscarsen
- Tom Robert Oscarsen - Ingebjørg Ringstad Oscarsson
- Inger Lise Oscarsson - Henrik Oschatz
- Ronni Oschatz - Bartlomiej Tadeusz Oscilowski
- Alexander Osdal - Bjørn Osdal
- Bjørn Osdal - Eva-Britt Ødegaard Osdal
- Geir Osdal - Hilde Osdal Osdal
- Hilde Randi Osdal - Iselin Osdal
- Jan Kristian Osdal - Klara Øye Osdal
- Kristin Osdal - Mailen Osdal
- Marcus Lund Osdal - Odd Inge Osdal
- Paula Mariann Ose Osdal - Ruth Bergem Osdal
- Sigmund Osdal - Stein Robert Osdal
- Stian Osdal - Torbjørn Osdal
- Tormod Osdal - Øyvind Osdal
- Birger Osdalen - Sigrid-Beate Osdalen
- Thorild Lunner Osdalen - Skender Osdautaj
- Valbone Osdautaj - Anette Ose
- Anette Høiaas Ose - Anne Michelle Osborg Ose
- Anne-Kari Ose - Beate Myrseth Ose
- Bent Ådne Ose - Brynhild Karin Ose
- Bård Harkjerr Ose - Edny Ose
- Egil Lars Ose - Elisabeth Ose
- Elisabeth Ose - Fredrik Ose
- Frode Johannessen Ose - Gunnar Bjarne Ose
- Gunnar D Ose - Harald Andreas Ose
- Hege Ose - Idar Ose
- Ina Ose - Jan Magnus Ose
- Jan Olav Ose - Josephine Buzon Ose
- Karianne Due Ose - Kjell Morgan Ose
- Kjellfrid Øye Ose - Kristina Ose
- Laila Ekeland Ose - Lisbet Ose
- Liv Berit Ose - Martha Øy Ose
- Martin Ose - Nils Sigurd Ose
- Nina Netland Ose - Per Johannes Ose
- Per Svein Ose - Rolf Terje Lervåg Ose
- Rønnaug Ose - Solveig Normann Ose
- Solveig Osborg Ose - Svein Ose
- Svein Ose - Tommy Ose
- Tone Ose - Trine Ose
- Trond Ose - Anne-Helene Ose-Johansen
- Eva Ose-Velle - Britt Alice Øverland Oseassen
- Christian Oftedal Oseassen - Silje Oseassen
- Tor Åge Oseassen - Hanne Osebakken
- Hege Gjerdevik Osebakken - Stig Osebakken
- Sveinung Osebakken - Andre Oseberg
- Anette Oseberg - Cecilie Hannevold Oseberg
- Christian Oseberg - Geir-Erik Oseberg
- Gry Anne Oseberg - Sissel Oseberg