Can the "Y" families be traced back to Cain and the mark of Cain, which was probably a "Y"?
'Waw" is the 6th letter of Hebrew alphabet.
https://en.wikipedia.org/wiki/Curse_and_mark_of_Cain
https://en.wikipedia.org/wiki/Tetragrammaton
https://en.wikipedia.org/wiki/Waw_(letter)
https://en.wikipedia.org/wiki/Curse_and_mark_of_Cain
Am I off the mark with this?