Joseph was one of the sons of Jacob, one of the patriarchs of the 12 Tribes of Israel. Joseph was sold to Egypt as a slave by his brothers, but since God was with him he ascended in rank up to the second in command after the pharaoh.
We have found several confirmations that Joseph indeed was in Egypt as the second commander in chief verifying the story. This means God exists since he made Joseph climb up to that rank because of a dream God gave to the Pharao that Joseph interpreted.
Joseph had two children that represent two independent tribes. These were named Ephraim and Manasseh. The descendants of Joseph are the British colonies as the tribe Ephraim while the tribe of Manasseh is mainly in The United States of America. Joseph saved the world by feeding them corn in ancient times, while in modern times his descendant USA pioneered the Green Revolution saving around 1 billion people from famine. The story of the 12 Tribes of Israel is found in the first book Genesis and the book ends with the death of Joseph.
Archaeological Evidence for the Biblical Exodus - Proof of Israelite Migration and Story of Joseph
Strong evidence for Joseph's Tomb and Palace in Egypt