Cognomen Jaszewski (Jaszewski 
) , throughout the world, is a rare last name. The surname Jaszewski is habitual in Poland, where it is quite a rare surname, the United States, where it is a very rare surname, and Netherlands. Measured by absolute frequency, it is commonest in Poland, the United States, and the United Kingdom. Likewise, Jaszewski is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Jaszewski | Germany, United States, United Kingdom, Poland, Canada |
| floyd jaszewski American football tackle, US (b. 1927) |
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| marian jaszewski Polish politician and deputy, PL (b. 1962) |
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| robert jaszewski (b. 1960) |
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| michał jaszewski Polish sportsperson, PL (b. 1979) |
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| ryszard jaszewski researcher |
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