The names of the murderers of Joash being recorded, and their Gentile stock on the mother's side springing from Ammon and Moab, seems to have been done with a view to point out the aggravated sorrow of Joash in his last moments. Not only to have died in his bed full of diseases, but under the sword of foreigners. The fear of this was what made Saul's last moments doubly distressing. 1 Samuel 31:4.
Related Commentaries of 2 Chronicles 24:26
2 Chronicles 24:26
26 And these are they that conspired against him; Zabadf the son of Shimeath an Ammonitess, and Jehozabad the son of Shimrith a Moabitess.