Surname Iyoy (Iyoy 
) , in all the world, is a rare cognomen. The cognomen Iyoy is habitual in Philippines, where it is a rare surname, Indonesia, where it is a very rare surname, and Mexico, where it is an extremely rare surname. Also, Iyoy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Iyoy | Mexico, Indonesia, United States, Philippines |