Surname Ajain (Ajain 
) , in the world, is a very rare family name. The surname Ajain is habitual in Philippines, where it is an extremely rare surname, Malaysia, and Nigeria. In absolute terms, it is commonest in India, Nigeria, and Philippines. Likewise, Ajain is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ajain | Philippines, Australia, South Africa, India, Nigeria |