Surname Janske (Janske 
) , across the world, is a very rare family name. The cognomen Janske is habitual in Germany, where it is a very rare surname, the United States, where it is an extremely rare surname, and Brazil. Also, Janske is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Janske | Germany, United States, Brazil, Netherlands |
| joseph janske (b. 1806) |
|