Anubis
Anubis is the Egyptian god of mummification and the afterlife as well as the patron god of lost souls and the helpless. He is one of the oldest gods of Egypt, who most likely developed from the earlier (and much older) jackal god Wepwawet with whom he is often confused.
Anubis' image is seen on royal tombs from the First Dynasty of Egypt (c. 3150-2890 BCE) but it is certain he had already developed a cult following prior to this period in order to be invoked on the tomb's walls for protection. He is thought to have developed in response to wild dogs and jackals digging up newly buried corpses at some point in the Predynastic Period in Egypt (c. 6000-3150 BCE) as the Egyptians believed a powerful canine god was the best protection against wild canines.
He is depicted as a black canine, a jackal-dog hybrid with pointed ears, or as a muscular man with the head of a jackal. The color black was chosen for its symbolism, not because Egyptian dogs or jackals were black. Black symbolized the decay of the body as well as the fertile soil of the Nile River Valley which represented regeneration and life. The powerful black canine, then, was the protector of the dead who made sure they received their due rights in burial and stood by them in the life after death to assist their resurrection.
He was known as "First of the Westerners" prior to the rise of Osiris in the Middle Kingdom (2040-1782 BCE) which meant he was king of the dead (as "westerners" was the Egyptian term for departed souls in the afterlife which lay westward, in the direction of sunset). In this role, he was associated with eternal justice and maintained this association later, even after he was replaced by Osiris who was then given the honorary title 'First of the Westerners'.
In earlier times, Anubis was considered the son of Ra and Hesat (associated with Hathor), but after his assimilation into the Osiris myth he was held to be the son of Osiris and his sister-in-law Nephthys. He is the earliest Egyptian deity depicted on tomb walls and invoked for protection of the dead and is usually shown tending to the corpse of the king, presiding over mummification rituals and funerals, or standing with Osiris, Thoth, or other gods at the Weighing of the Heart of the Soul in the Hall of Truth in the afterlife.
A popular image of Anubis is the standing or kneeling man with the jackal's head holding the golden scales on which the heart of the soul was weighed against the white feather of truth. His daughter is Qebhet (also known as Kabechet) who brings cool water to the souls of the dead in the Hall of Truth and comforts the newly deceased. Anubis' association with Nephthys (known as "Friend to the Dead") and Qebhet emphasizes his long-standing role as protector of the dead and a guide for the souls in the afterlife.
The name "Anubis" is the Greek form of the Egyptian Anpu (or Inpu) which meant "to decay" signifying his early association with death. He had many epithets besides "First of the Westerners" and was also known as "Lord of the Sacred Land" (referencing the area of the desert where necropoleis were located), "He Who is Upon his Sacred Mountain" (referencing the cliffs around a given necropolis where wild dogs and jackals would congregate), "Ruler of the Nine Bows" (a reference to the phrase used for traditional enemies of Egypt who were represented as nine captives bowing before the king), "The Dog who Swallows Millions" (simply referring to his role as a god of death), "Master of Secrets" (since he knew what waited beyond death), "He Who is in the Place of Embalming" (indicating his role in the mummification process), and "Foremost of the Divine Booth" referencing his presence in the embalming booth and burial chamber.