Surname Jonsek (Jonsek 
) , worldwide, is a very rare last name. The surname Jonsek is characteristic of Germany, where it is a very rare surname, the United States, where it is an extremely rare surname, and Brazil. Very seldom, Jonsek is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jonsek | Brazil, Germany, Spain, United States |