Smith's Bible Dictionary (1863)
(bottle). “Children of Bakkuk” were among the Nethinim who returned from captivity with Zerubbabel. C. before 536).
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
BAK'BUK (a bottle). Among the Nethinim who returned with Zerubabbel are mentioned the children of Bakbuk. Ezr 2:51; Neh 7:53.