1 Chronicles 2:8

And the sons of Ethan; Azariah. Including his posterity, see Genesis 46:23 , the posterity of the other three sons of Zerah are not mentioned, either because the writer could not find the genealogy of them, as Kimchi; or rather, as he thinks, he cuts short the genealogy of Zerah, because the kingdom did not proceed from him, and returns to the genealogy of Hezron, from whence it did, or perhaps they had no children.