Family name Kielar (Kielar 
) , throughout the world, is quite a rare cognomen. The surname Kielar is characteristic of Eastern Europe, particularly Poland, where it is quite a rare surname, Czechia, and Bulgaria, where it is a rare surname. In absolute terms, it most frequently occurs in Poland, the United States, and Czechia. More prevalently, Kielar is the forename as well as the last name.
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| Kielar | Germany, France, Czechia, Poland, United States |
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barbara z. kielar Polish translator and translation specialist; professor at the University of Warsaw (1930-2021), PL (b. 1930) |
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| edward kielar PL (b. 1892) |
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bronisław kielar PL (b. 1945) |
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| wiesław kielar Polish writer (1919–1990), PL (b. 1919) |
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| helena kielar Polish Righteous Among the Nations, PL (b. 1927) |
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wojciech kielar Polish skydiver, PL (b. 1978) |
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| bronislav kielar CZ (b. 1928) |
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agata kielar-długosz PL |
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bartłomiej kielar PL (b. 1981) |
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| marzanna bogumiła kielar Polish poet, PL (b. 1963) |
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| piotr kielar Polish actor, PL (b. 1968) |
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| petr kielar (b. 1965) |
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| magdalena kielar Polish actress, PL (b. 1979) |
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| marcin kielar researcher |
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| filip kielar researcher (ORCID 0000-0003-1785-3889) |
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