Surname Kivioja (Kivioja 
) , throughout the world, is quite a rare cognomen. The last name Kivioja is characteristic of Northern Europe, particularly Finland, where it is quite a common surname, Estonia, where it is quite a rare surname, and Sweden, where it is a rare surname. Not in comparison with a country's population, it is commonest in Finland, Estonia, and the United States.
| VARIANT | COUNTRY |
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| Kivioja | Canada, Estonia, Finland, Sweden, United States |
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liisi kivioja Finnish politician (1859-1925), FI (b. 1859) |
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| vilho kivioja Finnish politician and cleric (1896-1977), FI (b. 1896) |
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| harald kivioja Estonian sport shooter, EE (b. 1908) |
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hannu kivioja Finnish actor, FI (b. 1963) |
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| olev kivioja (b. 1904) |
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| olli kivioja Finnish surgeon (b. 1925) |
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jarno kivioja Finnish pole vaulter, FI (b. 1982) |
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| mauno kivioja Finnish sculptor and medal designer (1941-2018), FI (b. 1941) |
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kaidi kivioja Estonian triathlete, EE (b. 1993) |
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laura kivioja sportsperson, FI |
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| teemu kivioja researcher |
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| reetta kivioja researcher |
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| henri kivioja Finnish ice hockey player, FI (b. 1986) |
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| kreeta-maria kivioja Finnish newscaster and journalist, FI (b. 1986) |
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| jarmo kivioja FI |
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Mr, Asko, Aino, Aigi, Aune, Aapo, Kari, Kati, Kyle, Pasi, Gary, Glen, Lari, Lisa, Jani, Jami, Jari, Juha, Juho, Jill, Taru, Tomi, Arja, Tero, Anni, Anna, Ms, Mia, Anu, Ari, Amy, Rod, Esa, Mari, Mary, Miro, Mika, Miko, Miia, Sara, Sari, Sami, Samu, Satu, Saku, Sini, Alex, Anne, and Timo