1 Esdras 5:38

38 The following clans, who claimed to be priestly clans, could find no record to prove their ancestry: Habaiah, Hakkoz, Jaddus (the ancestor of the clan of Jaddus had married Agia, one of the daughters of Barzillai, and had taken the name of his father-in-law's clan). Since they were unable to prove who their ancestors were, they were not allowed to function as priests.