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M*W: Excerpted from:
www.religious-studies.info/History_of_God.htm
“Thus says the LORD, the God of Israel: Long ago your ancestors-Terah and his sons Abraham and Nahor... served other gods.” (Joshua 24:2 NRSV) For the first seventy-five years of his life Abraham “served other gods”: Sumerian gods. Then, God called him out of his family. “Now the LORD had said to Abram, Get yourself out of your country, and from your kindred, and from your father’s house, to a land that I will show you. ... and Abram was seventy and five years old when he departed out of Haran.” (Genesis 12:1 KJV)
"Abraham is the father of the Jews. He started the religion of Judaism. Adam and Noah were not Jews. For this reason, in the Old Testament God is never called “the God of Adam” or “the God of Noah.” The expressions “God of my ancestors” and “God of your ancestors” appear often in the Old Testament. The word “ancestors” refers to Abraham, Isaac, and Jacob. Never did Abraham refer to God as “the god of my ancestors.” According to the genealogies of Genesis, Noah, the ancestor of Abraham, was alive when Abraham was 60 years old. At that time Abraham worshipped Sumerian gods. He learned about those gods from his parents, who were taught by their Sumerian parents, who ultimately were taught by Noah (the myth of Noah originated in Sumer). While Noah was alive Abraham “served other gods,” the gods of his ancestor Noah. Fifteen years after Noah’s death, when Abraham was 75 years old, God called Abraham out of his family and out of the “other gods.”
"Abraham was born in Sumer. He came from Ur, a city in Sumer west of the Euphrates river. He and his father were Gentiles. They worshipped Sumerian gods:Who was “the God of Abraham?” In the English versions of the Old Testament, the word “God,” in 213 instances, is the translation of the Hebrew word “El.” It is Strong’s word #410. In the Hebrew version of the book of Job, God is called “El” fifty-six times. “God {Heb. El} thunders marvelously with his voice.” (Job 37:5 KJV) El was the name of the god of Abraham. It was God’s original name. In the following verse Jacob (also known as Israel) built an altar to the god El: “There he erected an altar and called it El-Elohe-Israel {El, god of Israel}.” (Genesis 33:20 RSV) The phrase “El, god of Israel” makes it clear that the proper name of the god of Jacob was El. He was the god of Israel. Here is another verse, which shows that “El” was the proper name of God: “They fell on their faces, and said, ‘O God {Heb. El}, the God {Heb. Elohim} of the spirits of all flesh, shall one person sin and you become angry with the whole congregation?’” (Numbers 16:22 NRSV)
Abraham was also the father of Islam whose god was not the "El-oh" but "Al-lah." One and the same God. In fact, "God" is an English word taken from the German word "gut" which evolved into the word "good."
