Family name Геннагы (Геннагы 
, Gennagy 
) , around the globe, is an extremely rare surname. The cognomen Геннагы is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Much more prevalently, Геннагы is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Геннагы | Russia |
| Gennagy | United States |