Smith's Bible Dictionary

Rabshakeh (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.