When it comes to the Ancient Egyptians there are few names that hold as much weight as Osiris. He is the god of the afterlife and has the ability to walk between the 2 worlds- the physical and the underworld. But he did not just represent death in the physical world, also rebirth or what you may call being born again.
He was married to his sister Isis, who was goddess of the sky and love. Isis and Osiris had a child Horus, who is believed by many to be a reincarnation of Osiris. There is a huge back story to the trials, tribulations of the love story of Osiris and Isis, and the conception of their child Horus and this is explained in detail in the documentary below: