How then does this part "by the name YHWH was I not known to them" make sense?
God does not say things without meaning. They have prayed to Him saying El Shaddai and not saying the word "YHWH" as the verse says.
Else the verse has no meaning at all.
The previous books have been translated into Hebrew.
Abraham apparently didnt speak in Hebrew but the books have been written by Moses, who did, so he substituted the words Abraham used for YHWH. Else the verse is lying.
So the text is not an accurate account but rather words have been supplied and added?
So they just went in and added YHWH 6000+ times?
That is impossible if you consider the "ELS"
Equidistant Letter Sequence
you see
in Genesis and Exodus if you count every 15 letters (if I remember right) it spells TORAH over and over perfectly throughout the entire 2 books.
Then in you count every 15 letter but backwards in Numbers and Deuteronomy it spells TORAH over and over perfectly throughout the entire 2 books.
Then go to the book between those, Leviticus and count every 7th letter, it spells YHWH over and over throughout the entire book, perfectly.
AMAZING!
Psalm 22:22, "I will declare Your Name to My brothers! In the midst of the congregation I will give You praise!"