Commentaries:
It is not known if many high priests were buried among the kings. This honor was quite distinctive, and it was a recognition of two things: 1) that he was a great, righteous man and a tremendous influence on Joash; 2) that in reality Jehoiada actually ruled Judah for many years. He was the real king, whereas Joash, the front man, did not have what it took to be a good king. However, Jehoiada did.
John W. Ritenbaugh
Why Three Kings Are Missing From Matthew 1
Other Forerunner Commentary entries containing 2 Chronicles 24:15:
2 Kings 12:2-3
2 Kings 12:2-3
2 Chronicles 24:2