These sought their listing among those who were registered by genealogy, but it was not found; therefore they were excluded from the priesthood as defiled.
Nehemiah 7:64
Surrounding context
7:63 and of the priests: the sons of Habaiah, the sons of Koz, the sons of Barzillai, who took a wife of the daughters of Barzillai the Gileadite, and was called by their name.
7:64 These sought their listing among those who were registered by genealogy, but it was not found; therefore they were excluded from the priesthood as defiled.
7:65 And the governor said to them that they should not eat of the most holy things till a priest could consult with the Urim and Thummim.