Family name Kajajian (Kajajian 
) , in the entire world, is a very rare last name. The family name Kajajian is habitual in Armenia, where it is a rare surname, France, where it is an extremely rare surname, and Venezuela. Measured by absolute frequency, it is commonest in Armenia, the United States, and France.
| VARIANT | COUNTRY |
|---|---|
| Kajajian | France, Venezuela, United Kingdom, United States, Armenia |