Cognomen Leśniak (Leśniak 
, Лесьняк 
) , in all the world, is quite a common surname. The cognomen Leśniak is habitual in Poland, where it is quite a common surname, Ireland, where it is a rare surname, and Netherlands, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Poland, Ireland, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Leśniak | United Kingdom, Poland, France, Ireland, Netherlands |
| Лесьняк | Ukraine |
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jan leśniak Polish officer, GB (b. 1898) |
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| franciszek leśniak (b. 1846) |
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maria leśniak PL (b. 1902) |
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adam leśniak Catholic priest, PL (b. 1946) |
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janusz leśniak Polish photographer, born 1947, PL (b. 1947) |
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| władysław stanisław leśniak Polish officer, PL (b. 1897) |
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wojciech leśniak Polish actor, PL (b. 1951) |
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franciszek leśniak Polish historian, PL (b. 1953) |
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| tadeusz leśniak PL (b. 1896) |
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jerzy leśniak Polish journalist, PL (b. 1957) |
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| michał leśniak Polish actor (1913-1983), PL (b. 1913) |
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| julianna leśniak PL (b. 1903) |
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józef leśniak Polish politician and deputy, PL (b. 1968) |
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witold leśniak Polish official, PL (b. 1969) |
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| kazimierz leśniak PL (b. 1911) |
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Mo, Marta, Marek, Magda, Mirek, Alina, Anita, Aneta, Artur, Adaś, Agata, Aśka, Basia, Beata, Karol, Kamil, Kasia, Kinga, Paula, Pawel, Paweł, Piotr, Maria, Olga, Olaf, Emil, Ala, Jan, Ela, Ewa, Iza, Ola, Ula, Sara, Alex, Alan, Radek, Anna, Anka, Adam, Asia, Kuba, Remi, Daga, Leon, Lila, Jola, Tina, Ania, and Rafał