Cognomen Ljun (Liuni 
, Ljun 
, Leō 
) , around the world, is a rare last name. The last name Ljun is characteristic of Italy, where it is quite a rare surname, Switzerland, where it is a rare surname, and Argentina. Likewise, Ljun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Liuni | Italy, Malaysia, Argentina, India, China |
| Ljun | Philippines, China, Spain, Sweden |
| Leō | Myanmar |