Chemosh was the national deity of the Moabites (Numbers 21:29; Jeremiah 47:7,13,46).  In Judges 11:24 he also appears as the god of the Ammonites.  Solomon introduced, and Josiah abolished, the worship of Chemosh at Jerusalem (1 Kings 11:7; 2 Kings 23:13). [2]

Chemosh, an ancient West Semitic deity, revered by the Moabites as their supreme god. Little is known about Chemosh; although King Solomon of Israel built a sanctuary to him east of Jerusalem (1 Kings 11:7), the shrine was later abolished by King Josiah (2 Kings 23:13). The goddess Astarte was probably the cult partner of Chemosh. On the famous Moabite Stone, written by Mesha, a 9th-century-bc king of Moab, Chemosh received prominent mention as the deity who brought victory to the Moabites in their battle against the Israelites. [3]

Chemosh, the chief god of the Moabites.  Mesha, king of Moab, attributed his victories over Israel to Chemosh, dedicating a "high place" to him at Dibon.  Mesha also proscibed for him the Israelite city of Nebo and part of the spoils of war. . . . Others view Chemosh as the god of the neitherworld on the basis of an Akkadian god-list which identified him with the god Nergal.  Support for this identification may be found in Ugaritic texts. [4 - Encyclopedia Judiaca Vol. 5, Col. 390 ]