Imsety
Imsety (in ancient Egyptian: imsti; also spelled Imseti or Amset) is one of the four sons of Horus, along with Hapi, Duamutef, and Qebehsenuef.
Although the other sons of Horus have animal heads, he has the head of a human. In a funerary context, he was responsible for protecting the liver of mummified people. As ruler of one of the four cardinal directions, Imsety was associated with the south.
Name
Imsety's name might be translated as "He of the Dill." This could indicate that he is a personification of the herb dill. However, Imsety's name also resembled the Egyptian word for "liver" (mjst), which may be the reason why he became specifically linked with the liver.
His name is characterized by the use of hieroglyph Aa14, the Egyptian symbol for a human rib.
The name of Imsety incorporates the Egyptian grammatical dual ending (-ty or -wy), and therefore, along with Hapi, may have actually been a set of twin deities. There is evidence to support this in the somewhat feminine appearance of Imsety on some canopic jars.
Origin
Imsety and the other sons of Horus appear in the earliest known writings concerning the ancient Egyptian religion, the Pyramid Texts. A passage in the later Coffin Texts from the Middle Kingdom (2055–1650 BC) says they are the offspring of the goddess Isis and a form of Horus known as Horus the Elder.
He, himself, was protected by Isis.
Canopic jar
Canopic jars were containers used by the ancient Egyptians during the mummification process, to store and preserve the viscera of their soul for the afterlife. Each of Horus's sons were responsible for protecting a particular organ, was himself protected by a companion goddess, and represented a cardinal direction.
Imsety protected the liver, which was extracted from the body, mummified separately, and placed inside his jar. In some later tombs, these jars were merely symbolic and did not contain the actual organs.
Role
Although Imsety is most prominently found in funerary context as a canopic jar, he is possibly more closely associated with the Egyptian decans. Dutch Egyptologist Maarten Raven argues that the four sons originated as celestial deities, given that the Pyramid Texts frequently connect them with the sky and that Horus himself was a sky deity.
All four sons of Horus are connected with specific decans, ruling over them in some capacity, although the precise nature of their connection is not presently understood by scholars.
According to Cult of the Stars by occultist Travis McHenry, Imsety rules over the following decans:
Protector of Sah
Some funerary texts state that the four sons of Horus were responsible for preventing Set, in his form as the foreleg of an ox, from reaching the decanal star Sah. Sah was often equated to Osiris, who Set was responsible for murdering.
One theory suggests the four sons of Horus are actually four stars in the constellation Ursa Major, which was known to the ancient Egyptians as msxtyw, the Foreleg of Set. This asterism contained a total of seven stars, and these four would have been located in the "meaty" part of the thigh. In an astronomical context, these four stars formed a border between the southern sky and the northern sky, thereby drawing a barrier between Set and Sah (the constellation Orion).