John Gill Commentary 2 Chronicles 28:7

"And Zichri, a mighty man of Ephraim, slew Maaseiah the king`s son, and Azrikam the ruler of the house, and Elkanah that was next to the king." — 2 Chronicles 28:7 (ASV)

And Zichri, a mighty man of Ephraim, slew Maaseiah the king's
son
Who therefore must have escaped being burnt in the valley of Hinnom, or only was caused to pass through the fire there, (2 Chronicles 28:3) ,

and Azrikam the governor of the house ;
steward or treasurer in the king's house, in the same office as Sheban was, (Isaiah 22:15)

and Elkanah that was next to the king :
prime minister of state.