Easton's Bible Dictionary (1897)
Descendant, the last of the three sons of Caleb by his first wife Azubah (1 Chr. 2:18).
Smith's Bible Dictionary (1863)
(fugitive) a Son of Caleb, the son of Hezron, by his wife Azubah.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
AR'DON (fugitive), a son of Caleb, the son of Hezron, by his wife Azubah. 1 Chr 2:18.
Hitchcock's Bible Names (1869)
ruling; a judgment of malediction