In 950 BC the Arabs knew the name of God as Yahwah, but because Yahwah would not curse the Jews for them, His name was not spoken again by them.
Here is proof that the Arabs knew the God of Abraham as Yahwah, and not Allah.
Moabite Stone, 950 BC.
I am Mesha, son of Kemosh melek, the king of Moab, the Dibonite. My father was king over Moab for thirty years, and I became king after my father.
And I made this high place for Kemosh in Qarhar . . . because of the deliverance of Mesha, and because he has saved me from all the kings and because he caused me to see [my desire] upon all who hated me. Omri, king of Israel -- he oppressed Moab many days, because Chemosh was angry with his land.
And his son succeeded him, and he also said I will oppress Moab. In my day he spoke according to this word, but I saw my desire upon him and upon his house, and Israel utterly perished forever.
Now Omri had possessed all the land of Medeba and dwelt in it his days and half the days of his son, forty years, but Chemosh restored it in my day. And I built Baal-meon and I made in it the reservoir and I built Kiryathaim. And the men of Gad had dwelt in the land of Ataroth from of old and the king of Israel had built for himself Ataroth. And I foutht against the city and took it, and I slew all the people of the city, a sight pleasing to Chemosh and to Moab.
And I brought back from there the altar-hearth of Duda and I dragged it before Chemosh in Kiryoth. And I caused to dwell in it the men of Sharon and the men of Meharoth (?).
And Chemosh said to me: "Go take Nebo against Israel"; and I went by night and fought against it from break of dawn till noon, and I took it and slew all, seven thousand men and boys, women and girls, and I devoted it to Ashtar-Chemosh.
And I took from there the altar-hearths of Yahwah, and I dragged them before Chemosh. And the king of Israel built Jabaz and dwelt in it while he fought with..........
Response: Yahweh is a made up name and the very proof is your own Bible.
In early Jewish tradition, the people thought themselves to be unworthy to speak the name of God so loosely. So instead, they would say, "Adonai" (the lord) instead of the word represented by "YHWH".
The letters, YHWH are represented in Exodus 3:14. There we see that God revealed a name to Moses when Moses asked of what name he should say when he tells them that the God of their fathers has sent him.
That name is YHWH, according to the scripture. However, the ancient Hebrew is lost. So today, the meaning and pronunciation of the word is not known. The best guess would be "Yahweh", meaning "He is". This is why the English translation will say "I Am".
So the question would be, did God actually say "YHWH"? Again, in those times, it became a part of tradition not to speak God's name. They thought that such a thing is unholy to speak his name so loosely and the name should not be said so loosely on the mouths of unholy people. Instead, they would say, "Adonai", meaning "the lord".
Keeping this in mind, if the people did not wish to speak God's name so loosely, it is most logical to understand that his name was not written down either. So this is why "YHWH" was written in its place.
Further proof can be established when we look at the origin of the word "Jehovah". You see, after "YHWH" was written in the scripture, since those people of that time did not speak the name represented by "YHWH", when two scholarly brothers of Masoretes came later in the 10th century to add the vowels to the scripture, they added the vowels of the Hebrew word "Adonai" (the Lord), to indicate to the reader that the word referred to God and they should read "The Lord". This would make it Yahowah. But later in the 16th century, another scholar, Petrus Galatinus, mistakenly took the word as an actual word. The "J" in latin is pronounced as a "Y", so you get Jahowah. And to finally anglo-size the word, it became Jehovah.
This is not only an example of how the ancient Jews treated and respected the name of God in such a delicate fashion but how new names are created. They could have easily just made up some vowels. This is how sensitive they were to playing with the word. But this was not the tradition of all Jews. Many had no problem saying "Allah" or "Elloha" in classical Hebrew.
For evidence of this, when you read the Tanakh, you will notice that at times, the same stories are repeated. The only difference is that one story says "God" (Elloha) while the other says "The Lord" for God. (Yahweh). An example is in Gen.1:1 and Gen 2:4. This goes to show that some Jewish traditions required that you don't speak the name of God.
So again, if you can't speak it, you can't write it. Since "Yahweh" is the closest pronunciation to the "YHWH" in Hebrew, and the word means "He is", then we can conclude that when writing the scripture, some Jews replaced "Allah" with "He is", which in Hebrew means "Yahweh".
Simply put, your own Bible and history shows that Yahweh is not God's name but a made up name.