"Another group returned to Jerusalem at this time from the towns of Tel-melah, Tel-harsha, Kerub, Addan, and Immer. However, they could not prove that they or their families were descendants of Israel.
References for Nehemiah 7:61
This group included the families of Delaiah, Tobiah, and Nekoda -- a total of 642 people."
"Three families of priests -- Hobaiah, Hakkoz, and Barzillai -- also returned to Jerusalem. (This Barzillai had married a woman who was a descendant of Barzillai of Gilead, and he had taken her family name.)
But they had lost their genealogical records, so they were not allowed to serve as priests.
The governor would not even let them eat the priests' share of food from the sacrifices until there was a priest who could consult the LORD about the matter by means of sacred lots. "
References for Nehemiah 7:65