Surname Yayloyan (Яылоян 
, Yayloyan 
, Яйлоян 
) , across the world, is a rare last name. The cognomen Yayloyan is habitual in Armenia, where it is quite a rare surname, Russia, where it is a rare surname, and Belgium, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Russia, Armenia, and Ukraine. Also, Yayloyan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Яылоян | Russia, Armenia |
| Yayloyan | Russia, United States, Belgium, Armenia |
| Яйлоян | Ukraine, Russia, Armenia |
| Яилоиан | Russia |