Azariah son of Hilkiah, the son of Meshullam, the son of Zadok, the son of Meraioth, the son of Ahitub, the chief official of God’s temple;
The first verse looks back upon the foregoing genealogies, and tells us they were gathered out of the books of the kings of Israel and Judah, not that which we have in the canon of scripture, but another civil record, which was authentic, as the king's books with us. Mentioning Israel and Judah, the historian takes notice of their being carried away to Babylon for their transgression.
Commenting on 1 Chronicles 9:1-13
And their brethren, heads of the house of their fathers, one thousand and seven hundred and threescore. These, with other priests, made up this number, which was greater than those of Judah and Benjamin, that dwelt in Jerusalem, put together: very able men for the work of the service of the house of God: men that had not only strength of body, which some part...
And Azariah the son of Hilkiah, the son of Meshullam, the son of Zadok, the son of Meraioth, the son of Ahitub, the ruler of the house of God; (c) That is, he was the high priest.