Family name Mamchak (Mamchak 
) , worldwide, is a very rare cognomen. The family name Mamchak is characteristic of Australia, where it is a very rare surname, Nigeria, and Ukraine, where it is an extremely rare surname. Also, Mamchak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mamchak | Russia, Ukraine, United States, Nigeria, Australia |