The sons of Gershon were Ladan and Shimei.
Here we have, I. The crown entailed, according to the divine appointment, Ch1 23:1. David made Solomon king, not to reign with him, or reign under him, but only to reign after him. This he did, 1. When he was old and full of days. He was but seventy years old when he died, and yet he was full of days, satur dierum - satisfied with living in this world.
Commenting on 1 Chronicles 23:1-23
Of the Gershonites were Laadan and Shimei. These two were the immediate posterity of Gershon; are the same with Libni and Shimhi, and heads of families, Exo 6:17. . 1 Chronicles 23:8 ch1 23:8 ch1 23:8 ch1 23:8The sons of Laadan; the chief was Jehiah, and Zetham, and Joel. Not his immediate sons, but some that descended from him.
SONS OF GERSHON. (Ch1 23:7-11) the Gershonites--They had nine fathers' houses, six descended from Laadan, and three from Shimei.