Did Abraham, Isaac, and Jacob Know Yahweh by His Name?

From the Errancy Discussion list, 8 May 1997:

TILL
This guy has already shown us that he is going to be just another biblical
inerrantist, who declares with Christian honesty that he can't see a
contradiction, no matter how glaring it is. Now as Tod pointed out, Exodus
6:2-3 has Yahweh saying very clearly to Moses that he was not known to
Abraham, Isaac, and Jacob by his name Yahweh, yet there are numerous
examples in Genesis that dispute this:

Genesis 22:14 states that Abraham named the place where he was going to
offer up Isaac Yahweh-jirah, which meant "Yahweh will provide." How did
Abraham know to call the place this if he did not know that the name of his
god was Yahweh?

Genesis 24:25-52 certainly shows that Abraham's servant, who was
sent to find a wife for Isaac knew Yahweh's name. When he encountered
Rebekah, he bowed his head and "worshiped Yahweh" (v:25). He said,
"Blessed be Yahweh, the God of my master Abraham who has not forsaken
his lovingkindness and his truth toward my master. As for me, Yahweh has
led me in the way to the house of my master's brethren" (v:27). Several
more times in this passage, Abraham's god was called Yahweh. It is certainly
strange that Abraham's servant knew the name Yahweh, but Abraham,
despite evidence to the contrary, presumably didn't.

Genesis 26:22 says that Isaac dug a well and called the name of it Rehoboth
and said, "For now Yahweh has made room for us, and we shall be fruitful in
the land." How could Isaac have said this if he did not know that his god's
name was Yahweh?

Genesis 26:23-25 says that Isaac went to Beersheba and there "Yahweh
appeared to him the same night" and told Isaac that he was the God of
Abraham." Isaac then built an altar and "called upon the name of Yahweh."
I guess we are supposed to believe that Isaac called on a name that he
didn't even know.

Genesis 28:10-13 says that Jacob saw Yahweh on the way to Paddanaram,
and Yahweh said to him, "I am Yahweh, the god of Abraham your father,
and the God of Isaac." I guess Jacob was hard of hearing and didn't catch
the name Yahweh.

Genesis 28:20 says that Jacob awoke the next morning and made a deal
with God, vowing that if God would keep him in the way, give him bread
to eat, raiment to wear, and bring him back again to his father's house in
peace, he would make Yahweh his God and would surely give him a tenth
of all that God would give to him." How could Jacob have made Yahweh
his God if he didn't even know the name Yahweh? (By the way, if you
wonder where the idea of tithing began, this is it, but it certainly gave
Jacob no room to brag about his godliness. Why, gee, if Yahweh will give
me a lot of money, I will gladly give him a tenth of it. I would do the same
to anybody.)

Farrell Till