Last name Oien (Oien 
) , worldwide, is quite a rare family name. The cognomen Oien is habitual in Norway, where it is quite a rare surname, the United States, where it is a rare surname, and New Zealand. Not in comparison with a country's population, this name is the most popular in the United States, Norway, and Malaysia. Very seldom, Oien is the forename as well as the last name.
| halvor oien American politician, US (b. 1870) |
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justin oien American cyclist, US (b. 1995) |
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| karin oien researcher |
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| krestina oien Norwegian association football player |
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| michael oien American jazz musician (b. 1981) |
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| oien josian cyclist, BB (b. 1989) |
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