Cognomen Ohannesyan (Ohannesyan 
) , all around the world, is a very rare last name. The surname Ohannesyan is habitual in Turkey, where it is a very rare surname, Canada, and Germany, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Turkey, the United States, and Germany. Much less frequently, Ohannesyan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ohannesyan | Canada, Germany, United States, Turkey |