Family name Fronczak (Fronczak 
) , around the world, is quite a rare cognomen. The cognomen Fronczak is characteristic of Poland, where it is quite a rare surname, the United States, where it is a rare surname, and Ireland. Not in comparison with a country's population, it is commonest in Poland, the United States, and Brazil. Likewise, Fronczak is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Fronczak | Germany, United States, Poland, France, Brazil |
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franciszek e. fronczak US (b. 1874) |
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| henryk fronczak Polish rower, PL (b. 1898) |
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| jerzy fronczak Polish association football player (1922-1980), PL (b. 1922) |
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| adam fronczak Polish physician, PL (b. 1957) |
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| waldemar fronczak PL (b. 1955) |
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| andrzej fronczak (b. 1959) |
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| maciej fronczak researcher, PL |
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| stan fronczak college basketball player (1948–1948) Illinois |
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| piotr fronczak Polish physicist (Warsaw University of Technology), PL |
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| agata fronczak Polish physicist (Warsaw University of Technology), PL |
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