Surname Sylys (Sylys 
, Силис 
) , in the world, is a very rare last name. The family name Sylys is characteristic of Belarus, where it is a very rare surname, Russia, and Kazakhstan. Very seldom, Sylys is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sylys | Venezuela, South Africa, United States |
| Силис | Russia, Kazakhstan, Belarus |