Last name Olej (Olej 
) , all around the world, is a rare family name. The family name Olej is habitual in Eastern Europe, particularly Slovakia, where it is quite a rare surname, Poland, where it is a rare surname, and Czechia. Also, Olej is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Olej | Germany, Czechia, Hungary, Poland, Slovakia |
| mieczysław olej PL (b. 1898) |
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| emil olej PL (b. 1932) |
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| jozef olej Czechoslovak member of Czechoslovak parliament, lawyer and slovak nation politician (b. 1953) |
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| vladimír olej SK (b. 1954) |
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| peter olej (b. 1973) |
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| marián olej (b. 1983) |
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