John Gill's Bible Commentary Ver. 8. The sons of Laadan; the chief was Jehiah, and Zetham, and Joel .] Not his immediate sons, but some that descended from him.
Matthew Henry Commentary
Verses 1-23 - David, having given charge concerning the building of the temple settles the method of the temple service, and orders the officers of it. When those of the same family were employed together, it woul engage them to love and assist one another.
Original Hebrew בני1121 לעדן3936 הראשׁ7218 יחיאל3171 וזתם2241 ויואל3100 שׁלשׁה׃7969