Brown-Driver-Briggs
רְחוּם,
רְחֻם proper name, masculine (
compassion, or
softness, Gentleness ?); — post-exilic name:
1 with Zerubbabel:
a. רְחוּם Ezra 2:2, A Ιρεουμ’, ᵐ5L Ναουμ ( = נְחוּם "" Nehemiah 7:7).
b. priest, רְחֻם Nehemiah 12:3 Ρεουμ ( = חָרִם Nehemiah 12:15, compare Nehemiah 7:42 = Ezra 2:39; Ezra 10:21, see חָרִם 3a).
2 רְחוּם, with Nehemiah:
a. Levite Nehemiah 3:17, Βασουθ, א A ᵐ5L Ραουμ.
b. Nehemiah 10:26, Ρα[ε]ουμ.
רְחוּם proper name, masculine Persian official Ezra 4:8 (usually explained from √ רחם, see Biblical Hebrew; Scheft92 thinks possibly originally רוחם, Old Iranian proper name rukma, = splendour).