Cognomen Itoyo (Itoyo 
) , all over the world, is a very rare last name. The surname Itoyo is habitual in Nigeria, where it is an extremely rare surname, and China. Much more prevalently, Itoyo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Itoyo | Japan, China, Nigeria, United States, Brazil |