Last name Тер-Григорян (Тер-Григорян 
, Ter-Grigoryan 
, Ter-Grigorian 
) , worldwide, is a rare family name. The surname Тер-Григорян is habitual in Armenia, where it is quite a rare surname, Georgia, where it is a rare surname, and Russia. Not in comparison with a country's population, it is commonest in Russia, Armenia, and the United States. Very seldom, Тер-Григорян is the forename as well as the last name. Parts of the name also exists independently as a first name Тер, and a first name Григорян.
| VARIANT | COUNTRY |
|---|---|
| Тер-Григорян | Russia, Ukraine, Armenia |
| Ter-Grigoryan | Russia, United States, Armenia |
| Ter-Grigorian | United States, Georgia |