Surname Semeny (Semeny 
, Семений 
) , throughout the world, is a rare last name. The family name Semeny is habitual in Bulgaria, where it is a rare surname, Russia, and Ethiopia, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Russia, Ethiopia, and France.
| VARIANT | COUNTRY |
|---|---|
| Semeny | Ethiopia, Bulgaria, France, United States |
| Семений | Ukraine, Russia, Kazakhstan |