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