The sons of Ephraim - The genealogy is difficult. It is perhaps best to consider Ezer and Elead (1 Chronicles 7:21) not as sons …

And the sons of Ephraim
A son of Joseph, and father of a tribe of this name, whose genealogy through five generation…

No account is given here of either Zebulun or Dan. We can assign no reason why they alone should be omitted; but it is the disgrace of the tribe of…