Family name Gajowniczek (Gajowniczek 
) , around the globe, is a rare last name. The surname Gajowniczek is habitual in Poland, where it is quite a rare surname, Norway, where it is a rare surname, and Italy, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Poland, Italy, and the United States. More frequently, Gajowniczek is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gajowniczek | Norway, Poland, Italy, United States, Argentina |
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franciszek gajowniczek Polish Army officer, PL (b. 1901) |
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janusz gajowniczek (b. 1946) |
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| marianna gajowniczek Polish Righteous Among the Nations, PL (b. 1933) |
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| krzysztof gajowniczek Polish researcher, PL |
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| zofia gajowniczek Norwegian swimmer (b. 1983) |
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