Family name Olša (Olša 
) , in the entire world, is a very rare last name. The family name Olša is characteristic of Eastern Europe, particularly Czechia, where it is a rare surname, and Slovakia.
| josef florian olša CZ (b. 1891) |
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jaroslav olša CZ (b. 1964) |
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| jaroslav olša Czech diplomat, orientalist, translator and writer, CZ (b. 1938) |
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| oldřich olša (b. 1933) |
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