Family name Zelazny (Zelazny 
, Żelazny ) , in the world, is quite a rare surname. The last name Zelazny is characteristic of Poland, where it is quite a rare surname, Israel, where it is a rare surname, and France. Measured by absolute frequency, this name is the most popular in Poland, the United States, and France. Also, Zelazny is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Zelazny | Poland, Canada, France, Germany, United States |
| Żelazny | Poland, United States |
| roger zelazny U.S. science fiction and fantasy writer and poet (1937–1995), US (b. 1937) |
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| mary lou zelazny American painter (b. 1956) |
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| trent zelazny writer, US (b. 1976) |
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| mirosław zelazny researcher |
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| jamie zelazny researcher (ORCID 0000-0002-8750-8223) |
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| adrian m zelazny researcher |
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| bernhard zelazny British entomologist, GB |
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| erwin zelazny French footballer, FR (b. 1991) |
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