Easton's Bible Dictionary (1897)
Be gracious, O Nebo! or a cup-bearer of Nebo, probably the title of Nergal-sharezer, one of the princes of Babylon (Jer. 39:3).
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
SAM'GAR-NE'BO (sword of Nebo), a Babylonish prince. Jer 39:3.