(chief cupbearer), (2 Kings 19:1; Isaiah 36:1; Isaiah 37:1) ... one of the officers of the king of Assyria sent against Jerusalem in the reign of Hezekiah. [HEZEKIAH] (B.C. 713.) The English version takes Rabshakeh as the name of a person; but it is more probably the name of the office which he held at the court, that of chief cupbearer.
Smith’s Bible Dictionary
Rabshakeh
Smith’s Bible Dictionary, William Smith (1863). Public domain, from the CrossWire SWORD module.