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, Lebanon, Argentina, United States, Cyprus |
| Halajyan | Canada, Estonia, Greece, United States |
| Halagian | Israel, Canada, United States |
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մարատ հալաջյան AM (b. 1920) |
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դավիթ հալաջյան Armenian composer and conductor, AM (b. 1962) |
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