Surname Kosař (Kosař 
) , in all the world, is a rare cognomen. The cognomen Kosař is habitual in Eastern Europe, particularly Czechia, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kosař | Czechia |
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karel kosař Czech chemist, CZ (b. 1951) |
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| josef kosař (b. 1893) |
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| vincenc kosař (b. 1910) |
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| jiří kosař CZ (b. 1928) |
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| karel kosař (b. 1949) |
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| martin kosař researcher ORCID ID = 0000-0002-9400-2327 |
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| pavla kosař CZ (b. 1978) |
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| david kosař (b. 1979) |
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