Family name Ciechanowski (Ciechanowski 
) , across the world, is quite a rare cognomen. The cognomen Ciechanowski is characteristic of Poland, where it is quite a rare surname, Belgium, where it is a rare surname, and Israel. In absolute terms, it most frequently occurs in Poland, the United States, and Germany. Likewise, Ciechanowski is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ciechanowski | Germany, Belgium, United States, Poland, France |
| wojciech jacek ciechanowski (b. 1680) |
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| jan ciechanowski PL (b. 1796) |
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stanisław ciechanowski PL (b. 1869) |
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jan ciechanowski Polish diplomat (1887-1973), PL (b. 1887) |
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| hieronim ciechanowski (b. 1828) |
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| celestyn ciechanowski RU (b. 1835) |
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| stanisław ciechanowski PL (b. 1845) |
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| zygmunt ciechanowski PL (b. 1873) |
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| bolesław ciechanowski Officer of the Polish Army, RU (b. 1897) |
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| kazimierz ciechanowski UA (b. 1914) |
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| jan ciechanowski Polish historian (1930-2016), PL (b. 1930) |
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damian ciechanowski Polish association football player, PL (b. 1996) |
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| grzegorz ciechanowski (b. 1957) |
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| jan stanisław ciechanowski Polish historian, PL (b. 1974) |
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| paul ciechanowski researcher |
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