Last name Hernay (Hernay 
) , in all the world, is a very rare cognomen. The family name Hernay is habitual in Latin America and the Caribbean, particularly Venezuela, where it is a rare surname, Chile, where it is an extremely rare surname, and Argentina. Not in comparison with a country's population, it is the most numerous in Venezuela, Philippines, and Mexico. Very seldom, Hernay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hernay | Philippines, Argentina, Venezuela, Chile, Mexico |