Family name Loepthien (Loepthien 
) , in the world, is a very rare last name. The surname Loepthien is characteristic of Western Europe, particularly Switzerland, where it is a rare surname, and Germany, where it is a very rare surname. Much less frequently, Loepthien is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Loepthien | United States, Germany, Switzerland |