Cognomen Аджай (Ajay 
, Ajai 
, Adjai 
) , across the world, is a common last name. The surname Аджай is habitual in Mauritius, where it is quite a common surname, Qatar, and United Arab Emirates (explore the name in all countries). Measured by absolute frequency, it is the most numerous in India, Nigeria, and Nepal. Much more prevalently, Аджай is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ajay | Nepal, United States, Saudi Arabia, India, United Arab Emirates |
| Ajai | Oman, United States, Saudi Arabia, India, United Arab Emirates |
| Adjai | Nigeria, Ethiopia, United States, Ghana, Benin |
| Аджай | Kyrgyzstan, Russia, Kazakhstan, Ukraine, United States |