Surname Upayacu (Upayacu 
) , in the entire world, is a very rare last name. The last name Upayacu is habitual in Peru, where it is a very rare surname, Venezuela, where it is an extremely rare surname, and the United States. Very seldom, Upayacu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Upayacu | Peru, Venezuela, United States |