Eldaah (אֶלְדָּעָה) is a Hebrew proper name meaning "God of knowledge" or "God has known," combining el (God) and dah (knowledge, from yada — to know). The name appears twice in the genealogy of Midian (Genesis 25:4; 1 Chronicles 1:33) as the fifth son of Midian, grandson of Abraham through Keturah.
Eldaah belongs to the lineage that descended from Abraham's second family through Keturah. These nations — Midian and its clans — were not part of the covenant line through Isaac, yet God saw and knew them too. The name "God of Knowledge" points to one of the most profound divine attributes: omniscience. God does not merely know facts; He knows persons — Hagar in the wilderness (Genesis 16:13), the Midianite peoples on the margins of Israel's story. Psalm 139 celebrates this knowing: "O LORD, you have searched me and known me." The theology embedded in this obscure genealogical name is quietly subversive: no person, no nation, no child born outside the spotlight of history is unknown to God.