Finn person fra Jessheim
- Silje Iren Olsen
- Stian Gudbrandstuen Olsen
- Stig Terje Olsen
- Stine Sveen Olsen
- Sunisa Olsen
- Terje Olsen
- Thea Olsen
- Tom Inge Olsen
- Tommy Olsen
- Tor Olsen
- Tore Ragnar Olsen
- Trine V Kvernstad Olsen
- Trond Harald Olsen
- Trond Martin Olsen
- Truls Olsen
- Wenche Olsen
- Øivind Olsen
- Ørjan Helmer Olsen
- Åse Kjellrun Olsen
- Susan Marie Olson-Tolo
- Helene Olsrud
- Elin Isabell Olsson
- Emma Paulina Amanda Olsson
- Fredrik Nils Oscar Olsson
- Gustav Olsson
- Jim Tomas Olsson
- Per Lars Robin Olsson
- Pär Niklas Olsson
- Ranveig Synnøve Olsson
- Marte Øverbye Olstad
- Rune Olstad
- Stener Olstad
- Anne Karin Olsvik
- Liv Irene Olsvik
- Terje Olsvik
- Alina-Otilia Olteanu
- Kari Olufsen
- Dragan Oluic
- Olivera Oluic
- Farhan Mohamed Omar
- Radhiya Omar
- Razia Omar
- Said Ali Omar
- Taheni Omar
- Yashar Saado Omar
- Hrund Omarsdottir
- Jannike Omland
- Monica Ommen Hansen
- Kjerstin Onarheim
- Andreea-Maria Onetiu
- Olga Onnesepp
- Geir Onstad
- Lwin Lwin Oo
- Zaw Naing Oo
- Henriette Dahl Oord
- Paul Oord
- Wolter Leiker Oord
- Christian Elias Oorloff
- Kari Merete Opdal
- Astrid Opedal
- Endre Opedal
- Mats Opedal
- Mia Opedal
- Cathrine Opheim
- Hallgrim Opheim
- Irene Opheim
- Martin Opheim
- Randveig Marit Opheim
- Sigrid Olga Opheim
- Bård Øyvind Opland
- Emma Opland
- Ottar Opland
- Therese Opland
- Amalie Elisabeth Børke Oppegård
- Lise Oppegaard
- Are Opperud
- Ole Mattis Opperud
- Astrid Opsahl
- Borghild Opsahl
- Espen André Opsahl
- Janne Opsahl
- Terje Opsahl
- Monica Opset
- Magnus Mythe Opstad
- Monica Mythe Opstad
- Øyvind Konopka Ordemann
- Pedro P Jara Ordenes
- Rodrigo Ordenes
- Nikolaev Yordanov Orlin
- Vanja Orlovic
- Chatmongkhon Ormnok
- Frank Ormstad
- Solveig Orre
- Bjørn Kim Orseth
- Massimo Ortado
- Line Helene Oseberg
- Line Helene Oseberg
- Gatis Oskaja
- Mattias Oskarsson
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