Abraham
Abraham (אברהם "Father/Leader of many", Standard Hebrew Avraham, Tiberian Hebrew ʾAḇrāhām; Arabic ابراهيم Ibrāhīm) is the name given in the Book of Genesis to the ancestor of the Jews. Islam also regards him as the ancestor of the Bedouins, through Ishmael. Judaism, Christianity and Islam are sometimes referred to as the "Abrahamic religions" in reference to their supposed common descent from Abraham.
There is no known account of his life independent of Genesis, so it is not possible to know if he was a historical figure. If he was, he probably lived between 2000 BC and 1500 BC.
His original name was Abram (אברם "High/Exalted father/leader", Standard Hebrew Avram, Tiberian Hebrew ʾAḇrām); he was the foremost of the Biblical patriarchs. Later in life he went by the name Abraham. (See Genesis 17).