New Defender's Study Bible Notes
25:2 Midian. Of Keturah’s six sons (all probably born early in Abraham’s thirty-five year period with her), Midian is the only one whose descendants, the Midianites, are adequately identified. The others probably mixed with the various descendants of Ishmael, Lot and Esau to become the modern Arabic peoples. Abraham sent them “eastward” (Genesis 25:6) with adequate gifts to begin their own tribes, and this would correspond to Arabia.