Surname Il'Yas (Ильяс 
, Il'Yas ) , globally, is quite a rare cognomen. The surname Il'Yas is characteristic of Central Asia, particularly Kyrgyzstan, where it is quite a common surname, Turkmenistan, where it is quite a rare surname, and Uzbekistan. Measured by absolute frequency, it is commonest in Kyrgyzstan, Uzbekistan, and Russia. More frequently, Il'Yas is the forename as well as the last name.