Family name Jahnis (Jahnis 
) , in the entire world, is a very rare last name. The cognomen Jahnis is characteristic of Malaysia, where it is a very rare surname, and Germany, where it is an extremely rare surname. Very seldom, Jahnis is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jahnis | Germany, United States, Philippines, Malaysia, France |