Ezra 2:62

62 These people searched for their [family] names in the genealogical records, but their names couldn't be found there. For this reason they were considered contaminated and couldn't be priests.

Ezra 2:62 Meaning and Commentary

Ezra 2:62

These sought their register among those that were reckoned by
genealogy
To find their names written and registered there; for the Jews kept public registers of their priests, their descent, marriages, and offspring, that it might be known who were fit, and who not, to officiate as such:

but they were not found;
their names were not there, nor any account taken of them:

therefore were they, as polluted, put from the priesthood;
were not suffered to attend at the altar, and offer sacrifice, and enjoy the privileges belonging to that office.

Ezra 2:62 In-Context

60 the descendants of Delaiah, Tobiah, and Nekoda. These people totaled 652.

61 These descendants of the priests [couldn't prove their families were Israelites]: the descendants of Hobaiah, Hakkoz, and Barzillai (who had married one of the daughters of Barzillai from Gilead and took that [family] name).

62 These people searched for their [family] names in the genealogical records, but their names couldn't be found there. For this reason they were considered contaminated and couldn't be priests.

63 The governor told them not to eat any of the most holy food until a priest could use the Urim and Thummim [to settle the problem].

64 The whole assembly totaled 42,360.