Those who conspired against Joash were Zabad son of Shimeath the Ammonitess and Jehozabad son of Shimrith the Moabitess.
Jewish Publication Society of America Version (JPS1917) - 2 Chronicles 24:26 >And these are they that conspired against him: Zabad the son of Shimeath the Ammonitess, and Jehozabad the son of Shimrith the Moabitess.