ACUB (Apoc. Bakbuk) ā’ kǔb (Ακούβ variant forms in Gr. MSS; Ακουφ; Bakbouk). The sons of Acub as “temple servants” returned to Jerusalem from Babylonian exile with Zerubbabel. Acub in 1 Esdras 5:31 and Bakbuk (בַקְבּ֥וּק) in Ezra 2:51 and Nehemiah 7:53.

International Standard Bible Encyclopedia (1915)

(Codex Vaticanus, Akouph; Codex Alexandrinus, Akoum) = Bakbuk (Ezr 2:51; Ne 7:53): The descendants of Acub (temple-servants) returned with Zerubbabel to Jerusalem (1 Esdras 5:31).