John Gill Commentary 1 Kings 4

So King Solomon was king over all Israel .
As David his father was not at first, only over Judah, and as Solomon's successors were not, after the division of the kingdom under his son Rehoboam; though this seems to have a particular respect to what is related in the preceding chapter concerning the wisdom of Solomon, for which he was so famous, that he reigned by the consent of all, and in the hearts of all the people of Israel.

And these [were] the princes which he had
That were in office about him, in the highest posts of honour and trust:

Azariah the son of Zadok the priest :
or rather his grandson, since Ahimaaz was the son of Zadok, and Azariah the son of Ahimaaz, (1 Chronicles 6:8 1 Chronicles 6:9); though another Zadok may be meant, and his son not a priest but a prince, as the word may be rendered, and was Solomon's prime minister of state, and the rather, since he is mentioned first.

Elihoreph and Ahiah, the sons of Shisha, scribes
Their father Shisha, the same with Sheva, was scribe only in David's time; and he being dead very probably, both his sons were continued in the office as secretaries of state, Solomon having more business for such an office, see (2 Samuel 20:25) ;

Jehoshaphat the son of Ahilud, the recorder ;
who was in the same office in the times of David, and now held it under Solomon, (2 Samuel 8:16) (20:24) .

And Benaiah the son of Jehoiada [was] over the host
General of the army in the room of Joab, (1 Kings 2:35) ;

and Zadok and Abiathar [were] the priests ;
so they were when Solomon came to the throne; but Abiathar was deposed by him after some time, though he might retain the name afterwards, and be employed, as Ben Gersom thinks, in case of necessity, in the room of Zadok, or, however, be employed as a common priest at Jerusalem, upon a reconciliation with Solomon; though Kimchi thinks another Abiathar is meant, which is not so likely.

And Azariah the son of Nathan [was] over the officers
The twelve officers who provided food for Solomon's household after mentioned:

and Zabud the son of Nathan ;
another of the sons of Nathan the prophet: for he being a principal instrument of settling Solomon on the throne, had interest enough to promote his sons to the chief places of honour and trust: and this here

[was] principal officer, [and] the king's friend ;
a chief minister about him, very intimate with him, that kept him company, privately conversed with him, was in his secrets, and admitted to great privacy and nearness to him.