Last name Sitnik (Sitnik 
, Сытник 
, Ситник ) , in all the world, is a common cognomen. The surname Sitnik is characteristic of Eastern Europe, particularly Ukraine, where it is quite a common surname, Belarus, where it is quite a rare surname, and Russia. Much less frequently, Sitnik is the forename as well as the last name.
| jan sitnik PL (b. 1897) |
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| aleksandr grigorevich sitnik RU (b. 1950) |
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| andrzej sitnik PL (b. 1959) |
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| artur sitnik Polish drawer, PL (b. 1973) |
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| marek sitnik Olympic wrestler, PL (b. 1975) |
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| vassilii sitnik researcher |
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| katarzyna m. sitnik researcher |
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| s d sitnik researcher |
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| robert sitnik researcher ORCID ID = 0000-0002-8156-5462 |
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| sergei michailovich sitnik D.Sc. Voronezh State University 2016 |
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| debora sitnik researcher |
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| aleksander krzysztof sitnik PL (b. 1971) |
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| ewa sitnik |
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| małgorzata sitnik |
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