Cognomen Ян-Ілля (Ян-Ілля 
) , all around the world, is an extremely rare last name. Much more frequently, Ян-Ілля is the forename as well as the last name. Parts of the name also exists independently as a first name Ян, and a first name Ілля.
| VARIANT | COUNTRY |
|---|---|
| Ян-Ілля | Ukraine |