Ilya, Illia, Illya, Iliya, Il'ja, Ilija, or Ilia is the East Slavic form of the male Hebrew name Eliyahu (Elijah), meaning "My God is Yahu/Jah"". It comes from the Byzantine Greek pronunciation of the vocative (Ilía) of the Greek Elias. It is pronounced with stress on the second syllable. The diminutive form is Iliusha or Iliushen'ka. The Russian patronymic for a son of Ilya is "Il'jich", and a daughter is "Ilyinichna".
