Cognomen يلسي (يلسي 
, Yelsey 
) , in all the world, is a very rare last name. The surname يلسي is habitual in Iran, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| يلسي | Iran |
| Yelsey | United States |