John Gill Commentary 2 Chronicles 22:8

"And it came to pass, when Jehu was executing judgment upon the house of Ahab, that he found the princes of Judah, and the sons of the brethren of Ahaziah, ministering to Ahaziah, and slew them." — 2 Chronicles 22:8 (ASV)

And it came to pass, that when Jehu was executing judgment on
the house of Ahab
On Joram, his son, and seventy more sons, his kinsfolks, courtiers, and priests:

and found the princes of Judah, and or even the sons of the brethren of
Ahaziah ;
whose number was forty two:

that ministered to Ahaziah ;
had offices in his court, or in obedience to his will, went to visit the children of the king and queen of Israel:

and he slew them ;
Jehu did; of the occasion, time, and place of his meeting with them, and slaying them, see (2 Kings 10:12–14) .