Family name Oless (Oless 
) , all over the world, is a very rare cognomen. The family name Oless is characteristic of Latvia, where it is a rare surname, and the United States, where it is an extremely rare surname. More frequently, Oless is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oless | Tanzania, United States, Democratic Republic of the Congo, Latvia |