Cognomen Plesse-Janson (Plesse-Janson 
) , worldwide, is a very rare surname. The surname Plesse-Janson is characteristic of Western Europe, particularly Germany, where it is a very rare surname. Parts of the name also exists independently as a last name Plesse, and a last name Janson.
| VARIANT | COUNTRY |
|---|---|
| Plesse-Janson | Germany |