Last name Decowski (Decowski 
) , throughout the world, is a rare cognomen. The cognomen Decowski is habitual in Poland, where it is a rare surname, Israel, and the United States, where it is a very rare surname. Also, Decowski is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Decowski | Germany, Italy, United States, Poland, Israel |
| jacek decowski PL (b. 1896) |
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| adam decowski (b. 1948) |
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| michal patrick decowski researcher |
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