Family name Gradnik (Gradnik 
) , worldwide, is a very rare surname. The surname Gradnik is characteristic of Slovenia, where it is quite a rare surname, Switzerland, where it is a rare surname, and Italy, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Gradnik | Italy, United States, Slovenia, Switzerland, Turkey |
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alojz gradnik poet; translator, SI (b. 1882) |
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| rajko gradnik SI (b. 1880) |
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| jožef gradnik SI (b. 1897) |
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| vladimir gradnik SI (b. 1899) |
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| gradimir gradnik SI (b. 1928) |
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| maja končan-gradnik SI |
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| boris gradnik SI |
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| timotej gradnik SI |
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