Cognomen Hayrapetyan (Айрапетян 
, Hayrapetyan 
) , globally, is a common surname. The surname Hayrapetyan is characteristic of Armenia, where it is quite a common surname, Aruba, and Russia, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Russia, Armenia, and Ukraine. Also, Hayrapetyan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Айрапетян | Ukraine, Kazakhstan, Belarus, Russia, Armenia |
| Hayrapetyan | Germany, Uzbekistan, France, United States, Armenia |
Хайрапетян, and Хаырапетян
| h. hayrapetyan AZ (b. 1874) |
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| nina hayrapetyan AZ (b. 1889) |
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| arkadi hayrapetyan AZ (b. 1928) |
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| levon hayrapetyan Armenian philanthropist, AZ (b. 1949) |
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| mavrik hayrapetyan war veteran of the Nagorno-Karabakh War (1966-1992) (b. 1966) |
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| gayane hayrapetyan Armenian nurse, AZ (b. 1972) |
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| aram hayrapetyan Armenian footballer, AM (b. 1975) |
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| arman ash. hayrapetyan chess player (b. 1979) |
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| aram hayrapetyan Armenian weightlifter, AM |
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| stepan hayrapetyan Ph.D. Yerevan State University 1987 |
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| gurgen hayrapetyan Ph.D. Michigan State University 2011 |
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| hasmik hayrapetyan researcher |
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| artavazd r. hayrapetyan chess player (b. 1991) |
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| vahagn hayrapetyan Armenian association football player, AM (b. 1997) |
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| tatevik hayrapetyan AM (b. 1989) |
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