Family name Dudycz (Dudycz 
) , in the entire world, is a rare cognomen. The cognomen Dudycz is habitual in Poland, where it is a rare surname, Netherlands, where it is a very rare surname, and Thailand. In absolute terms, it is the most numerous in Poland, the United States, and Thailand. More frequently, Dudycz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Dudycz | Thailand, France, Brazil, Poland, United States |
| piotr dudycz PL (b. 1902) |
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radosław dudycz Polish sportsperson and athletics competitor, PL (b. 1974) |
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| walter dudycz politician, US (b. 1950) |
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| maria dudycz Australian health professional and disability advocate, AU |
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| helena dudycz Polish economist, PL |
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