Family name Ajac (Ajac 
) , all around the world, is a rare cognomen. The family name Ajac is habitual in France, where it is a rare surname, the United States, where it is an extremely rare surname, and Philippines. Not in comparison with a country's population, it most frequently occurs in France, the United States, and China. Much less frequently, Ajac is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ajac | China, Nigeria, United States, India, France |