Smith's Bible Dictionary (1863)
(Genesis 25:4; 1 Chronicles 1:3) the last in order of the sons of Midian.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
EL'DAAH (whom God calls), the last named son of Midian, and a grandson of Abraham by Keturah. Gen 26:4; 1 Chr 1:33.
Hitchcock's Bible Names (1869)
knowledge of God