Illya is a Slavic variant of Elijah, from Hebrew meaning 'My God is Yahweh.'
Illya is the Ukrainian and broader Slavic rendering of one of the most theologically charged names in the Hebrew tradition: Elijah, from the Hebrew אֵלִיָּהוּ (Eliyahu), meaning "my God is Yahweh." The prophet Elijah stands as one of the most dramatic figures in the Hebrew Bible — the desert ascetic who confronted the prophets of Baal on Mount Carmel, who heard God not in wind or fire but in a still, small voice, and who was taken to heaven in a chariot of fire without dying. That last detail made Elijah uniquely potent in Jewish eschatology, where he is expected to herald the coming of the Messiah.
As the name passed through Byzantine Greek (Elias) and into Slavic-speaking Christian communities, it evolved into Ilya in Russian and Illya in Ukrainian — the double L giving the Ukrainian form a slightly different rhythm and weight. In Russian literary tradition, Ilya Muromets stands as the archetypal bogatyr, the great folk hero of the Kievan cycle of epic poems, a man of superhuman strength and moral courage who defended his homeland. The name thus carries both prophetic fire and heroic valor.
, where the character Illya Kuryakin — a cool, enigmatic Soviet spy played by David McCallum — became a cultural phenomenon and introduced the spelling to Anglophone audiences. Today Illya occupies a compelling space: ancient and prophetic, heroic and slightly cinematic, at once deeply Eastern European and warmly cosmopolitan.