Family name Kostiuk (Kostiuk 
, Костюк 
) , worldwide, is a common cognomen. The surname Kostiuk is characteristic of Eastern Europe, particularly Ukraine, where it is quite a common surname, Belarus, and Russia, where it is quite a rare surname.
| františek kostiuk CZ (b. 1899) |
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| mike kostiuk American football player (1919-2015), US (b. 1919) |
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| pavel kostiuk CZ (b. 1946) |
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| i. kostiuk particle physicist at NIKHEF, Amsterdam |
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| larry kostiuk researcher |
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| olga kostiuk Russian museum curator of applied arts at the Hermitage, RU |
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| kostiuk nv researcher |
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| oksana volodymirivna kostiuk Ph.D. Ivan Franko National University of Lviv 2012 |
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| georgij kostiuk researcher |
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| anton kostiuk Ph.D. Technische Universität Kaiserslautern 2014 |
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| zinayida havrylivna kostiuk Ukrainian nurse |
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| michal kostiuk (b. 1974) |
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| theodor kostiuk |
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