Family name Остапчук (Ostapczuk 
, Остапчук 
, Ostapchuk ) , in the world, is a common surname. The family name Остапчук 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, Остапчук is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ostapczuk | Canada, Argentina, Italy, Poland, United States |
| Остапчук | Ukraine, Kazakhstan, Belarus, Russia, Kyrgyzstan |
| Ostapchuk | Canada, Argentina, Poland, United States, Russia |
Ostaptchouk, and Ostaptschuk
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яцко остапчук politician, UA (b. 1873) |
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| дмитро остапчук Ukrainian politician and activist, UA (b. 1844) |
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віктор миколайович остапчук Ukrainian politician, UA (b. 1955) |
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олександр миколайович остапчук UA (b. 1958) |
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остапчук, валерий евгеньевич RU (b. 1962) |
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володимир валерійович остапчук Ukrainian television presenter, UA (b. 1984) |
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| остапчук василь васильович Ukrainian military personnel, UA (b. 1977) |
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| остапчук сергій васильович UA (b. 1970) |
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| остапчук віктор миколайович Ukrainian military personnel, UA |
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| остапчук ярослав александрович Ukrainian military personnel (1980-2014), UA (b. 1980) |
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| остапчук сергій юрійович Ukrainian military personnel, UA |
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| остапчук, юлия анатольевна Olympic wrester, UA (b. 1989) |
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| остапчук, сергей игоревич Belorussian ice hockey player (1990-2011), BY (b. 1990) |
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Ян, Дар'Я, Даша, Дима, Діна, Неля, Нина, Ніка, Ніна, Ніла, Ваня, Вера, Вика, Вова, Влад, Віка, Віта, Віра, Лена, Леся, Ліна, Ліда, Дана, Люба, Петр, Геня, Мая, Аня, Аза, Зоя, Лев, Жан, Ева, Яна, Юля, Юзя, Юра, Єва, Кира, Кіра, Майя, Марк, Маша, Міра, Алла, Анна, Адам, Гліб, and Люся