Family name Chapchuk (Chapchuk 
, Чапчук 
) , across the world, is a very rare cognomen. The surname Chapchuk is habitual in Belarus, where it is a rare surname, Canada, where it is a very rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Chapchuk | Argentina, Canada, Brazil, United States |
| Чапчук | Russia, Ukraine, Belarus |