Cognomen Олльга (Ollga 
, Олльга 
) , all over the world, is an extremely rare family name. The cognomen Олльга is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Predominantly, Олльга is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ollga | Italy, United States, Greece, Brazil, Albania |
| Олльга | Russia |