Cognomen Onayi (Onayi 
) , worldwide, is a rare surname. The last name Onayi is habitual in the Democratic Republic of the Congo, where it is a rare surname, Nigeria, and Venezuela, where it is an extremely rare surname. Much less frequently, Onayi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Onayi | India, Nigeria, United States, Democratic Republic of the Congo, Venezuela |