Abraham’s family bloodline is from the land of Canaan as the Bible goes. From the Egyptian stand point Tao I was apart of an expansion into Ur and several of Tao’s family was actually born in Ur during their family conquest of Ur. For some reason Tao I (Terah) and his family where exiled from Ur which becomes the first Exodus story.
Gen:11:31: And Terah took Abram his son, and Lot the son of Haran his son's son, and Sarai his daughter in law, his son Abram's wife; and they went forth with them from Ur of the Chaldees, to go into the land of Canaan; and they came unto Haran, and dwelt there.
Gen:15:7: And he said unto him, I am the LORD that brought thee out of Ur of the Chaldees, to give thee this land to inherit it.
Just as African Americans are Americans by birth and nativity but our origin is somewhere from Africa.