Family name Ilgiz (Ильгиз 
, Илгиз 
, Ilgiz 
) , around the world, is quite a rare cognomen. The last name Ilgiz is characteristic of Kyrgyzstan, where it is quite a common surname, Uzbekistan, where it is a rare surname, and Russia. More frequently, Ilgiz is the forename as well as the last name.