Reading such quotes, you involuntarily begin to think - this is when the consequences of incest appeared and the mental abilities of individual individuals were affected!
In addition to the first Jews, there were other peoples who were not considered men, but had children from their wives. It was then that the female line of birth became important.
And concerning "there" - you first understand with your sub-language, and then think about high matters.
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Where did these tribes come from, if we take the biblical plot by axiom? There were Adam and Eve. They were driven out of Eden and commanded Eve to give birth in torment. There are no "other tribes" No more people were declared.