Cognomen Հալաջյան (Haladjian 
, Հալաջյան, Halajyan 
) , throughout the world, is a rare last name. The surname Հալաջյան is characteristic of Cyprus, where it is quite a rare surname, Lebanon, and Uruguay, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Lebanon, France, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Haladjian | France, Argentina, United States, Lebanon, Cyprus |
| Halajyan | Estonia, Canada, United States, Greece |
| Halagian | Canada, Israel, United States |
|
մարատ հալաջյան AM (b. 1920) |
|
|
դավիթ հալաջյան Armenian composer and conductor, AM (b. 1962) |
|