Family name Юлій-Ян (Юлій-Ян 
) , in the world, is an extremely rare cognomen. Much more prevalently, Юлій-Ян is the forename as well as the last name. Parts of the name also exists independently as a first name Юлій, and a first name Ян.
| VARIANT | COUNTRY |
|---|---|
| Юлій-Ян | Ukraine |