Surname Ilgis (Ильгис 
, Илгис , Ilgis 
) , all over the world, is a very rare family name. The last name Ilgis is habitual in Kyrgyzstan, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Venezuela, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Kyrgyzstan, Russia, and Kazakhstan. More prevalently, Ilgis is the forename as well as the last name.