Gave him the testimony— Both here and in the parallel place, 2 Chronicles 23:11 there is nothing for gave him; and therefore as the word put refers to to testimony as well as crown, it is very doubtful what is the meaning of the word in this place; but as the word certainly denotes additional or adventitious embellishments or ornaments, we may very well understand it here some royal robe or ornament, wherewith it was usual to invest kings on their coronation. See Exodus 33:4. 2 Samuel 1:24 and Parkhurst's Lexicon on the word עדה 6:
Related Commentaries of 2 Kings 11:12
2 Kings 11:12
12 And he brought forth the king's son, and put the crown upon him, and gave him the testimony; and they made him king, and anointed him; and they clapped their hands, and said, God save the king.