Osiris can be considered the brother of Isis, Set, Nephthys, and Horus the Elder, and father of Horus the Younger. The first evidence of the worship of Osiris was found in the middle of the Fifth Dynasty of Egypt (25th century BC), although it is likely that he was worshiped much earlier; the Khenti-Amentiu epithet dates to at least the First Dynasty, and was also used as a pharaonic title. Most information available on the Osiris myth is derived from allusions contained in the Pyramid Texts at the end of the Fifth Dynasty, later New Kingdom source documents such as the Shabaka Stone and the "The Contendings of Horus and Seth", and much later, in narrative style from the writings of Greek authors including Plutarch and Diodorus Siculus.