Shallum is the name of several Old Testament men, including a king of Israel, temple and gate officials, Levites, genealogical figures, and a son of Josiah. The best-known Shallum in the supplied material is the short-reigning king of Israel and Josiah’s son who became Jehoahaz of Judah.
Shallum son of Jabesh assassinated Zachariah and reigned in Samaria for only a month before Menahem killed him. Shallum son of Josiah succeeded his father as Jehoahaz, was taken captive to Egypt by Pharaoh Necho, and died there. Other bearers served as temple keepers, gatekeepers, Levites, or appeared in genealogies.
The name is explained as “retribution.” The king of Israel’s brief reign illustrates the instability of the northern kingdom. Jehoahaz was the first king of Judah to die in exile, after Egypt replaced him with Eliakim.