Brown Driver Briggs

 Rehum = "compassion"
1. an man who returned from exile with Zerubbabel
  1) also 'Nehum'
2. a commander who wrote a letter to the king Artaxerxes in which he
opposed the rebuilding of Jerusalem
3. a Levite of the family of Bani who assisted in rebuilding the walls
of Jerusalem
4. one of the chiefs of the people who sealed the covenant with Nehemiah
5. a priest who returned from exile with Zerubbabel