Nehemiah 7:63-64

The following priestly clans could find no record to prove their ancestry: Hobaiah, Hakkoz, and Barzillai. (The ancestor of the priestly clan of Barzillai had married a woman from the clan of Barzillai of Gilead and taken the name of his father-in-law's clan.) Since they were unable to prove who their ancestors were, they were not accepted as priests.