What does Ezra 8:12 mean?

Of the sons of Joab, Obadiah the son of Jehiel; and with him two hundred eighteen males.

Of the sons of Shelomith, the son of Josiphiah; and with him one hundred sixty males.

Of the sons of Bebai, Zechariah the son of Bebai; and with him twenty-eight males.

Of the sons of Adonikam, who were the last; and these are their names: Eliphelet, Jeuel, and Shemaiah; and with them sixty males.

Of the sons of Bigvai, Uthai and Zabbud; and with them seventy males.

I gathered them together to the river that runs to Ahava; and there we encamped three days: and I looked around at the people the priests, and found there were none of the sons of Levi.