Smith's Bible Dictionary (1863)
(the moon), the fourth in order of the sons of Joktan, (Genesis 10:26; 1 Chronicles 1:20) and the progenitor of a tribe of southern Arabia.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
JE'RAH (moon), a people descended from Joktan, who gave name to a region of Arabia, Gen 10:26: 1 Chr 1:20; perhaps the Moon Coast and Moon Mountains, near Hazarmaveth. Bochart proposes to identify this people with the Alilaei, or Beni-Hilal, "sons of the new moon." dwelling in the south of Chawlan.
Hitchcock's Bible Names (1869)
the moon; month; smelling sweet