Family name Ongayi (Ongayi 
) , in the entire world, is quite a rare cognomen. The surname Ongayi is characteristic of Sub-Saharan Africa, particularly the Democratic Republic of the Congo, where it is quite a rare surname, Kenya, where it is a rare surname, and Nigeria, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ongayi | Kenya, South Africa, Nigeria, Democratic Republic of the Congo |