Last name Naumencu (Naumencu 
) , around the globe, is a very rare cognomen. The cognomen Naumencu is habitual in Romania, where it is a rare surname, and Italy, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Naumencu | Italy, Romania |
| mihai naumencu Romanian rower, RO (b. 1945) |
|