|Easton's Bible Dictionary|
(god) protect the king!, a son of Sennacherib, king of Assyria. He and his brother Adrammelech murdered their father, and then fled into the land of Armenia (2 Kings 19:37).
Int. Standard Bible Encyclopedia
sha-re'zer (sar'etser, shar'etser): Corresponds to the Assyrian Shar-ucur, "protect the king"; found otherwise, not as a complete name, but as elements in personal names, e.g. Bel-shar-ucur, "may Bel protect the king," which is the equivalent of Belshazzar (Daniel 5:1). The name is borne by two persons in the Old Testament:
(1) The son of Sennacherib, king of Assyria, who with ADRAMMELECH (which see) murdered his father (2 Kings 19:37 Isaiah 37:38). The Babylonian Chronicle says concerning Sennacherib's death: "On the 20th day of Tebet Sennacherib, king of Assyria, was slain by his son in a revolt." This differs from the Old Testament account in that it speaks of only one murderer, and does not give his name. How the two accounts can be harmonized is still uncertain. Hitzig, (Kritik, 194;), following Abydenus, as quoted by Eusebius, completed the name of Sennacherib's son, so as to read Nergal-sharezer = Nergal-shar-ucur (Jeremiah 39:3, 13), and this is accepted by many modern scholars. Johns thinks that Sharezer (shar'etser or sar'etser) may be a corruption from Shar-etir-Ashur, the name of a son of Sennacherib (1-vol HDB, under the word). The question cannot be definitely settled.
(2) A contemporary of the prophet Zechariah, mentioned in connection with the sending of a delegation to the spiritual heads of the community to inquire concerning the propriety of continuing the fasts: "They of Beth-el had sent Sharezer and Regem-melech" (Zechariah 7:2). This translation creates a difficulty in connection with the succeeding words, literally, "and his men." The Revisers place in the margin as an alternative rendering, "They of Beth-el, even Sharezer.... had sent." Sharezer sounds peculiar in apposition to "they of Beth-el"; hence, some have thought, especially since Sharezer seems incomplete, that in the two words Beth-el and Sharezer we have a corruption of what was originally a single proper name, perhaps Bel-sharezer = Bel-shar-ucur = Bel-shazzar. The present text, no matter how translated, presents difficulties.
F. C. Eiselen
Sharezer (5 Occurrences)
2 Kings 19:37 It happened, as he was worshipping in the house of Nisroch his god, that Adrammelech and Sharezer struck him with the sword; and they escaped into the land of Ararat. Esar Haddon his son reigned in his place. (WEB KJV ASV BBE DBY WBS NAS NIV)
Isaiah 37:38 It happened, as he was worshipping in the house of Nisroch his god, that Adrammelech and Sharezer his sons struck him with the sword; and they escaped into the land of Ararat. Esar Haddon his son reigned in his place. (WEB KJV ASV BBE DBY WBS YLT NAS NIV)
Jeremiah 39:3 that all the princes of the king of Babylon came in, and sat in the middle gate, to wit, Nergal Sharezer, Samgarnebo, Sarsechim, Rabsaris, Nergal Sharezer, Rabmag, with all the rest of the princes of the king of Babylon. (WEB KJV ASV DBY WBS YLT NIV)
Jeremiah 39:13 So Nebuzaradan the captain of the guard sent, and Nebushazban, Rabsaris, and Nergal Sharezer, Rabmag, and all the chief officers of the king of Babylon; (WEB KJV ASV DBY WBS YLT NIV)
Zechariah 7:2 The people of Bethel sent Sharezer and Regem Melech, and their men, to entreat Yahweh's favor, (WEB ASV BBE NAS NIV)