Surname Капай (Kapai 
, Капай 
, Kapay 
) , around the globe, is quite a rare family name. The cognomen Капай is habitual in the Democratic Republic of the Congo, where it is a rare surname, Kenya, and Hungary. In absolute terms, it is commonest in India, the Democratic Republic of the Congo, and Kenya. Much less frequently, Капай is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kapai | Kenya, Hungary, United States, India, Greece |
| Капай | Kyrgyzstan, Kazakhstan, Ukraine, Russia |
| Kapay | South Africa, United States, India, Myanmar, Democratic Republic of the Congo |