Cognomen Olszar (Olszar 
) , in the entire world, is a rare family name. The surname Olszar is habitual in Eastern Europe, particularly Czechia, where it is a rare surname, Poland, and Slovakia. Likewise, Olszar is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Olszar | Germany, Slovakia, Czechia, Poland, United States |
|
henryk olszar Polish clergyman, PL (b. 1957) |
|
| jan olszar PL (b. 1898) |
|
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| sebastian olszar Polish footballer, PL (b. 1981) |
|