3 occurrences in 3 dictionaries
Reference: Bakbuk
Morish
Bak'buk
Ancestor of some Nethinim who returned from exile. Ezr 2:51; Ne 7:53.
Smith
Bak'buk
(bottle). "Children of Bakkuk" were among the Nethinim who returned from captivity with Zerubbabel.
Ezr 2:51; Ne 7:53
(B.C. before 536).