Last name Önen (Oenen 
, Önen 
) , in the entire world, is a common cognomen. The family name Önen is habitual in Turkey, where it is quite a common surname, Netherlands, where it is quite a rare surname, and Denmark, where it is a rare surname. In absolute terms, it is commonest in Turkey, Netherlands, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Oenen | Germany, Netherlands, Indonesia, Denmark, China |
| Önen | United Kingdom, Germany, United States, Turkey |
| nazım önen Turkish politician, TR (b. 1887) |
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| zafer önen Turkish actor, TR (b. 1921) |
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| hakkı yılmaz önen Turkish politician, TR (b. 1934) |
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tufan önen basketball player (1989-), TR (b. 1989) |
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| emin önen Turkish politician, TR (b. 1976) |
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| selin önen researcher |
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| mehmet önen researcher |
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| merve özkılınç önen researcher (ORCID 0000-0002-3988-2464) |
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| senem önen researcher (ORCID 0000-0001-9550-636X) |
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| zeynep pınar önen researcher (ORCID 0000-0002-9778-9882) |
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| nihal tüner önen (b. 1976) |
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| abdülkadir emin önen TR (b. 1976) |
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| ufuk önen |
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