Surname Łaszewski (Łaszewski 
) , throughout the world, is a rare cognomen. The family name Łaszewski is habitual in Eastern Europe, particularly Poland, where it is a rare surname.
| VARIANT | COUNTRY |
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| Łaszewski | Poland |
| michał remigiusz łaszewski †, Auxiliary Bishop of Warmia (Ermland), Poland ; Bishop, PL (b. 1682) |
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| ryszard łaszewski PL (b. 1828) |
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| józef łaszewski Polish rower, PL (b. 1901) |
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| bolesław łaszewski PL (b. 1912) |
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| ryszard łaszewski PL (b. 1941) |
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