Last name Oler (Ole 
, Oler 
, Олер 
) , in all the world, is a common cognomen. The family name Oler is habitual in Kenya, where it is quite a common surname, Israel, where it is quite a rare surname, and Denmark. In absolute terms, it most frequently occurs in Kenya, the Democratic Republic of the Congo, and Philippines. More frequently, Oler is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ole | Kenya, Germany, Norway, Denmark, Democratic Republic of the Congo |
| Oler | Poland, Spain, United States, Philippines, China |
| Олер | Kazakhstan, Ukraine, Russia |
| wesley oler American baseball player (1891-1980), US (b. 1891) |
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| leon oler (b. 1899) |
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| alexandre oler French poet, FR (b. 1930) |
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| norman oler (b. 1929) |
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| james oler Canadian religious leader and criminal (born 1964), CA (b. 1964) |
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| norman oler Ph.D. McGill University 1957 |
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| andrew j oler researcher ORCID ID = 0000-0002-6310-0434 |
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| jonathan a oler researcher (ORCID 0000-0002-1333-6924) |
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| james walter oler Ph.D. Purdue University 1980 |
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| kim oler American composer, US |
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| carmine oler college basketball player (1949–1949) Syracuse |
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