Cognomen Januk (Januk 
) , throughout the world, is a rare surname. The surname Januk is characteristic of Malaysia, where it is a very rare surname, South Africa, and Georgia. Not in comparison with a country's population, this name is the most popular in Indonesia, South Africa, and Malaysia. More prevalently, Januk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Januk | United States, South Africa, Malaysia, India, Indonesia |