Cognomen איירו (Iero 
, איירו 
) , around the globe, is a rare last name. The last name איירו is characteristic of Italy, where it is a rare surname, Indonesia, where it is a very rare surname, and Australia. Not in comparison with a country's population, this name is the most popular in Italy, Indonesia, and the United States. Likewise, איירו is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Iero | Italy, Guinea-Bissau, Japan, United States, Indonesia |
| איירו | Israel |