Last name Kärn (Kärn 
, Keerna) , globally, is a very rare cognomen. The last name Kärn is characteristic of Sweden, where it is a rare surname, and Germany, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kärn | Germany, Sweden |
| konrad kärn DE (b. 1950) |
|