The name Eliyyah combines eli (my God) and Yah (Yahweh), meaning "My God is Yahweh." It appears as an alternate or abbreviated form of the name Elijah, borne by a minor Levite in Ezra 10:26. The name itself is a bold theological confession.
In the Old Testament world where gods were many and loyalties were tested, the name Eliyyah was a statement of allegiance: my God — not Baal, not Asherah — is Yahweh. This is also the name of the great prophet Elijah (spelled Eliyahu, H452), whose ministry confronted idolatry and called Israel back to covenant faithfulness. Every bearer of this name was a living testimony to monotheistic faith.