Cognomen Klemetti-Falenius (Klemetti-Falenius 
) , worldwide, is an extremely rare surname. The last name Klemetti-Falenius is characteristic of Northern Europe, particularly Finland, where it is a very rare surname. Parts of the name also exists independently as a last name Klemetti, and a last name Falenius.
| VARIANT | COUNTRY |
|---|---|
| Klemetti-Falenius | Finland |