Family name Erthy (Erthy 
) , throughout the world, is an extremely rare surname. The family name Erthy is habitual in New Zealand, where it is a very rare surname, and Mexico, where it is an extremely rare surname. Also, Erthy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Erthy | Philippines, Mexico, United States, India, New Zealand |