Easton's Bible Dictionary (1897)
Merciful. (1.) One of “the children of the province” who returned from the Captivity (Ezra 2:2); the same as “Nehum” (Neh. 7:7). (2.) The “chancellor” of Artaxerxes, who sought to stir him up against the Jews (Ezra 4:8-24) and prevent the rebuilding of the walls and the temple of Jerusalem. (3.) A Levite (Neh. 3:17). (4.) Neh. 10:25. (5.) A priest (Neh. 12:3).
Smith's Bible Dictionary (1863)
(merciful).
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
RE'HUM (compassionate). One who returned with Zerubbabel, Ezr 2:2, called Nehum in Neh 7:7. The chancellor who wrote to Artaxerxes in order to prevent the rebuilding of the walls and temple of Jerusalem. Ezr 4:8-9, 2 Sam 21:17, Heb 12:23. A Levite who assisted in repairing the wall of Jerusalem. Neh 3:17. One who signed the covenant with Nehemiah. Neh 10:25. A priest who returned with Zerubbabel, Neh 12:3; called Harim in Neh 12:15.
Hitchcock's Bible Names (1869)
merciful; compassionate