Last name Руснак (Rusnak 
, Rusnac 
, Руснак 
) , around the globe, is a common family name. The surname Руснак is habitual in Eastern Europe, particularly Moldova, where it is quite a common surname, Slovakia, and Ukraine. Measured by absolute frequency, it is the most numerous in Ukraine, Slovakia, and the United States. Very seldom, Руснак is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Rusnak | Romania, Moldova, Slovakia, Poland, United States |
| Rusnac | Romania, Moldova, Canada, Czechia, United States |
| Руснак | Moldova, Ukraine, Kazakhstan, Belarus, Russia |
| Rousnak | France |
| руснак орест манолійович German lyrical tenor (1895-1960), UA (b. 1895) |
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| руснак василь UA (b. 1899) |
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| руснак денис манолійович UA (b. 1901) |
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руснак, иван степанович UA (b. 1952) |
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| руснак адальберт адальбертович Soviet association football player, UA (b. 1946) |
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| руснак іван степанович Ukrainian pedagogue, UA (b. 1949) |
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яна руснак UA (b. 1993) |
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| руснак манолій васильович UA (b. 1945) |
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| руснак володимир петрович UA (b. 1946) |
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| лариса емельяновна руснак Ukrainian actress, UA (b. 1962) |
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| руснак рахіля тимофіївна UA (b. 1952) |
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| руснак, иван иванович Ukrainian association football player (1966-2017), UA (b. 1966) |
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| руснак ірина євгеніївна UA (b. 1964) |
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| руснак микола ігорович Ukrainian military personnel, UA (b. 1975) |
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| руснак олександр васильович Ukrainian military personnel, UA |
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Ян, Дора, Дося, Дима, Діна, Неля, Нина, Ніна, Вера, Витя, Віта, Віра, Зіна, Леся, Лера, Ліна, Ліда, Люба, Жана, Олег, Отто, Илья, Даша, Дар'Я, Петр, Глеб, Аня, Зоя, Оля, Ина, Ион, Тая, Яна, Іза, Ізя, Катя, Инга, Коля, Марк, Міра, Алик, Алла, Алім, Алік, Алін, Анна, Амін, Адам, Майя, and Инна