Cognomen Гилис (Gilis 
, Guilis 
, Gylys 
) , throughout the world, is quite a rare family name. The cognomen Гилис is characteristic of Lithuania, where it is quite a common surname, Belgium, and Latvia, where it is quite a rare surname. In absolute terms, it is commonest in Belgium, Lithuania, and France. Very seldom, Гилис is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gilis | Belgium, Latvia, Poland, France, Lithuania |
| Guilis | Philippines, United States, Argentina, Canada, Brazil |
| Gylys | Romania, United Kingdom, United States, Canada, Lithuania |
| Гилис | Kazakhstan, Russia |
| гилис, янис степанович Soviet footballer (1943-2000), LV (b. 1943) |
|