Last name Ongoi (Ongoi 
) , worldwide, is a rare surname. The cognomen Ongoi is characteristic of Mongolia, where it is quite a rare surname, Kenya, where it is a rare surname, and Malaysia, where it is a very rare surname. Much less frequently, Ongoi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ongoi | India, Malaysia, Mongolia, Kenya |