Globally, Олдьга (Олдьга 
, Oldga 
) is a very rare feminine first name. The first name Олдьга is characteristic of Eastern Europe, particularly Russia, where it is an extremely rare female name. Very seldom, Олдьга is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Олдьга | Russia |
| Oldga | Mexico, United States |