Family name Łyjak (Łyjak 
) , across the world, is a rare surname. The cognomen Łyjak is habitual in Eastern Europe, particularly Poland, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Łyjak | Poland |
| wiktor łyjak PL (b. 1954) |
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| zygmunt łyjak Polish Righteous Among the Nations, PL |
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| juliana łyjak Polish Righteous Among the Nations, PL |
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| wiesław łyjak PL |
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| wiktor łyjak PL |
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Maja, Mariusz, Mateusz, Michał, Andrzej, Barbara, Dominik, Natalia, Izabela, Wiktor, Łukasz, Krzysiek, Patrycja, Grzegorz, Weronika, Wojciech, Stanisław, Agnieszka, Katarzyna, Błażej, Tomasz, Joanna, Renata, Anna, Adam, Kuba, Olga, Maria, Marta, Marek, Kamil, Paweł, Piotr, Daria, Jakub, Marcin, Monika, Sylwia, Adrian, Karina, Patryk, Robert, Krzysztof, and Małgorzata