And of the children of the priests
Who could not make out their pedigree, for those that could are mentioned before:
the children of Habaiah, the children of Koz, the children of
Barzillai;
how the latter came by this name follows:
which took a wife of the daughters of Barzillai the Gileadite, and was
called after their name;
this man married a woman that descended from the famous Barzillai the Gileadite, in the times of David; and the priesthood being in disuse, and mean and despicable, in Babylon, he chose to take the name of his wife's family, and pass for a descendant from that, and perhaps destroyed, or at least neglected, to take care of the genealogy of his own family.
The Brenton translation of the Septuagint is in the public domain.