Cognomen Казак (Kosak 
, Казак 
, Kazak 
) , in all the world, is a common surname. The last name Казак is characteristic of Belarus, where it is quite a common surname, Slovenia, and Turkey. In absolute terms, it is commonest in Turkey, Russia, and Belarus. Much less frequently, Казак is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kosak | Turkey, Germany, United States, Poland, Slovenia |
| Казак | Kazakhstan, Russia, Belarus, Moldova, Ukraine |
| Kazak | Turkey, Germany, Syria, United States, Poland |
| Kasack | Germany, Brazil, United States |
|
казак, ярослав иванович politician, UA (b. 1944) |
|
|
мікалай станіслававіч казак Soviet physicist, BY (b. 1945) |
|
| казак, дмитрий васильевич Hero of the Soviet Union, UA (b. 1907) |
|
|
| казак, иван корнилович RU (b. 1900) |
|
|
| казак, павел корнилович UA (b. 1901) |
|
|
| казак, манфред антонович RU (b. 1908) |
|
|
| казак, иван емельянович RU (b. 1919) |
|
|
| генадзь казак BY (b. 1924) |
|
|
| казак, виктор дмитриевич RU (b. 1928) |
|
|
| уладзімір еўдакімавіч казак BY (b. 1936) |
|
|
| казак, леонид васильевич politician, UA (b. 1947) |
|
|
| наталья ивановна казак Soviet rower (b. 1960) |
|
|
| метин казак Bulgarian politician, BG (b. 1972) |
|
|
| людмила казак Belarusian lawyer, BY |
|
|
| казак, яков Belarusian footballer, BY (b. 1985) |
|
Ян, Петр, Пётр, Дана, Дар'Я, Дина, Дима, Діну, Неля, Нина, Паша, Ніна, Вера, Вова, Влад, Віта, Віра, Лада, Лена, Леха, Люся, Ніла, Гліб, Баха, Анна, Аня, Нур, Зоя, Лев, Ида, Ион, Еіп, Рая, Яна, Юля, Юра, Єва, Катя, Кызы, Макс, Марк, Маша, Мира, Миша, Алик, Алла, Лёша, and Олег