King of the Ammonites at the time of the Babylonian captivity (Jer. 40:14). He hired Ishmael to slay Gedaliah who had been appointed governor over the cities of Judah.
Jer.40: And said unto him, Dost thou certainly know that Baalis the king of the Ammonites hath sent Ishmael the son of Nethaniah to slay thee? But Gedaliah the son of Ahikam believed them not.