In the entire world, Oili (Oili 
, น้ำมัน) is a rare feminine first name. The forename Oili is characteristic of Finland, where it is quite a rare girly name, and India, where it is an extremely rare feminine name. Also, Oili is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Oili | Malaysia, Sweden, France, Finland, Morocco |
| oili jaatinen Finnish actress, FI (b. 1899) |
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| oili mäki (1925-2011), FI (b. 1925) |
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| oili suomi Finnish politician, FI (b. 1927) |
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| oili komonen FI (b. 1921) |
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| oili tanninen Finnish chilrdren's writer and graphic artist, FI (b. 1933) |
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| oili korkeamäki Finnish politician, FI (b. 1934) |
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| oili vainio Finnish singer (1940-2001), FI (b. 1940) |
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| oili suominen Finnish translator, FI (b. 1941) |
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| oili salonen researcher |
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| oili sauna-aho researcher |
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| oili papinaho researcher (ORCID 0000-0002-5133-2801) |
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| oili m.e. ylivaara researcher |
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| oili oksanen Peerage person ID=278017 |
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| oili kiviranta FI |
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| oili urmas |
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