From which of Adam's sons are we all descended?
The obvious answer is, Sheis. People assume that Kayin's line was wiped out, and that we're all from Sheis only, but that's not necessarily true. According to Rashi, we are descended from Kayin just as much as we are descended from Sheis.
Na'ama was Noach's wife. According to Rashi, this Naama was a descendant of Kayin: she was the daughter of Lamech, son of Mesusha'eil, son of Mechuya'eil, son of Chanoch, son of Kayin.
Others (see Mei'am Lo'ez Breishis page 107,) though, say that Noach's Naama was not the one referred to as Kayin's descendant, it was some other Na'ama that was descended from Sheis.
But going with Rashi, and assuming that the three sons of Noach were all from his wife Na'ama, they, and we, may all be 50% descended from Kayin.
I don't know who Kayin's sons married. Maybe they married descendants of Sheis. But if Kayin's family only married Kayin descendants up till Noach, that means that our mitochondrial DNA is all Kayin-ish, assuming, again, that Kayin married his own twin.
I don't know who Kayin's sons married. Maybe they married descendants of Sheis. But if Kayin's family only married Kayin descendants up till Noach, that means that our mitochondrial DNA is all Kayin-ish, assuming, again, that Kayin married his own twin.
(Since Og was king of the Emori, I assume that he was not from Kayin.)
A great addition from R Avrohom Wagner:
This certainly would have made it easier to pick names for the kids if not for the fact that they generally made up new names.
A great observation from R Micha Berger:
I replied,
A great addition from R Avrohom Wagner:
Also interesting to note (as featured at my Shabbos table every Shabbos Bereishis) is that Noach was the first person (that we know of) to have his father and father-in-law share a name - they were both called Lemech.So their family lines were Noach, ben Lamech ben Mesushelach ben Chanoch ben ben ben Keinan , and Naama was bas Lemech ben Mesusha'eil ben Mechuya'eil ben Chanoch ben Kayin.
This certainly would have made it easier to pick names for the kids if not for the fact that they generally made up new names.
A great observation from R Micha Berger:
Notice also that it's Qayin's kids who develop cities, metalurgy, music, .... It's like Noach's side is credited for its moral message, and he marries someone from the line that started developing the tools with which we can better implement that morality.
I replied,
Fascinating. More prosaically,the doers come from Kayin and the dreamers from Sheis.