Smith's Bible Dictionary (1863)
(watch-tower), son of Eliphaz, son of Esau, (Genesis 36:11) and one of the “dukes” or phylarchs of the Edomites. ver. (Genesis 36:15) In (1 Chronicles 1:36) he is called Zephi. (B.C. after 1760.)
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
ZE'PHO (watch-tower). Gen 36:11, 2 Sam 20:15, or ZE'PHI, 1 Chr 1:36, a son of Kliphaz, the son of Esau.
Hitchcock's Bible Names (1869)
Zephon, that sees and observes; that expects or covers