Beth-lehem-judah - so called in contradistinction to a town of the same name in Zebulun (Jos 19:15).
of the family - that is, tribe.
of Judah - Men of the tribe of Levi might connect themselves, as Aaron did (Exo 6:23), by marriage with another tribe; and this young Levite belonged to the tribe of Judah, by his mother’s side, which accounts for his being in Beth-lehem, not one of the Levitical cities.