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 | Lithuania, France, Latvia, Poland, Belgium |
| Guilis | Brazil, Argentina, Canada, United States, Philippines |
| Gylys | Canada, Lithuania, United Kingdom, United States, Romania |
| Гилис | Russia, Kazakhstan |
| гилис, янис степанович Soviet footballer (1943-2000), LV (b. 1943) |
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