Probably by orthographical error for Zakkay; Zabbai (or Zaccai), an Israelite -- Zabbai.
see HEBREW Zakkay
H2079. Zabbay
זַבַּי proper name, masculine (Palmyrene זבי VogNo. 28 (but this perhaps = loricatus, compare lorica) **on Palmyrene זבי (probably abbreviated from ... זבד), see Lzb265 Cooke273, 291; connection with above √ uncertain) — Jew in Ezra's time Ezra 10:28; ᵐ5 Ζαβου(θ); compare also Nehemiah 3:20 Kt (ᵐ5 Ζαβου etc., but Qr זַכַּי; see זַכָּ֑י Ezra 2:9 = Nehemiah 7:14).