Last name Ящук (Ящук 
, Iashchuk 
, Yashchuk 
) , in the world, is a common surname. The surname Ящук is characteristic of Ukraine, where it is quite a common surname, Belarus, where it is quite a rare surname, and Kazakhstan. In absolute terms, it most frequently occurs in Eastern Europe, particularly Ukraine, Russia, and Belarus.
| VARIANT | COUNTRY |
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| Ящук | Ukraine, Kazakhstan, Belarus, Russia, Kyrgyzstan |
| Iashchuk | Greece, Ukraine, Finland, Norway, Poland |
| Yashchuk | Belarus, Russia, United States, Poland, Sudan |
| Iachtchouk | Canada |
Jaschtschuk, Yaschuk, and Yashuk
| ящук иван хомич UA (b. 1899) |
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| ростислав давыдович ящук UA (b. 1915) |
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инна петровна ящук UA (b. 1972) |
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данила сергеевич ящук footballer, RU (b. 1995) |
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| ящук, владимир иванович Ukrainian journalist, writer and local historian, UA (b. 1951) |
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| ящук валерій миколайович UA (b. 1944) |
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| ящук петро лаврентійович UA (b. 1948) |
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| ящук павел владимирович Ukrainian military personnel, UA (b. 1966) |
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| ящук максим володимирович Ukrainian military personnel, UA (b. 1991) |
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Ян, Леся, Ліна, Ліля, Ліда, Ліза, Люба, Лєна, Олег, Илья, Инна, Иван, Емма, Енна, Сава, Тіна, Рома, Рита, Яків, Яков, Ілія, Ілля, Віра, Віта, Влад, Вера, Зоя, Лев, Ира, Яна, Юля, Єва, Катя, Кіра, Майя, Алла, Іван, Анна, Афія, Геня, Глеб, Гнат, Петр, Дар'Я, Дима, Неля, Нина, Ніна, Адам, and Інна