Bah, another one of these. Although the name is probably older and completely unrelated to Kenneth, it sounds like some pseudo-Biblical hick name derived from Kenneth to me. I simply can't stand these -iah names.
He is from the tribe of Levi in the Bible. You can see his reference in the Old Testament in 1 Chronicles 15:22. Also one of the highly skilled musician and with a deep talent in his voices. Appointed by King David on his time.