Cognomen Carhuay (Carhuay 
) , across the world, is a rare last name. The surname Carhuay is characteristic of Latin America and the Caribbean, particularly Peru, where it is a rare surname, and Argentina, where it is an extremely rare surname. Much less frequently, Carhuay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Carhuay | Peru, Argentina |