The proper name Eldaah means 'God has known.' In Genesis 25:4 it appears as one of the sons of Midian, himself a son of Abraham by Keturah. The name is theophoric — incorporating the divine name El with the verb yada (to know), declaring that God's knowledge extends even to this branch of Abraham's family outside the covenant line of Isaac.
Even among the non-covenant peoples descended from Abraham, names testified to a knowledge of God. Midian later plays a key role in Moses' formation: his father-in-law Jethro was a Midianite priest (Exodus 18) and offered wise counsel on governance. God's knowledge reaches beyond the boundaries of covenant Israel — a foretaste of the universal scope of redemption in Christ, who came so that 'all the ends of the earth will see the salvation of our God' (Isaiah 52:10).