Sopdet is the ancient Egyptian name of the star Sirius and its personification as an Egyptian goddess. Known to the Greeks as Sothis, she was conflated with Isis as a goddess and Anubis as a god.

A Hellenic bust of Sopdet, syncretized with Isis and Demeter

Her name usually appears as Sopdet (Ancient Egyptian: Spdt,[3] lit. “Triangle” or “Sharp One”) after the known Greek and Latin form Sothis (Greek: Σῶθις, Sō̂this)

History

The engravings on the ivory tablet formerly believed to discuss Sopdet snow a bull

During the early period of Egyptian civilization, the heliacal rising of the bright star preceded the usual annual flooding of the Nile.  She was also venerated as a goddess of the fertility brought to the soil by the flooding.

She was long thought to be represented by the cow on an ivory tablet from the reign of Djer (Dynasty I),[8] but this is no longer supported by most Egyptologists.[9] During the Old Kingdom, she was an important goddess of the annual flood and a psychopomp guiding deceased pharaohs through the Egyptian underworld. During the Middle Kingdom, she was primarily a mother and nurse and, by the Ptolemaic period, she was almost entirely subsumed into Isis.[10]

Myths

Sopdet is the consort of Sah, the personified constellation of Orion near Sirius. Their child Venus[1] was the hawk god Sopdu,[8] “Lord of the East”.[11] As the “bringer of the New Year and the Nile flood”, she was associated with Osiris from an early date[8] and by the Ptolemaic period Sah and Sopdet almost solely appeared in forms conflated with Osiris[12] and Isis.

https://en.wikipedia.org/wiki/Sopdet.

Isis

Isis is a goddess in Egyptian mythology. She was the sister and wife of Osiris. Isis and Osiris had a son named Horus. As goddess of life and magic, Isis protected women and children, and healed the sick. Closely linked to the throne, she was one of the greatest goddesses of Ancient Egypt.

Her symbols were the ankh, her wings, and throne headdress.

The Egyptian name was recorded as ỉs.t or ȝs.t. It meant ‘(She of the Throne)’.

Cults

Isis was perhaps the most important goddess of all Egyptian mythology. During the course of Egyptian history, Isis assumed the attributes and functions of virtually every other important goddess in the land. Her most important functions, however, were those of motherhood, marital devotion, healing the sick, and the working of magical spells and charms. She was believed to be the most powerful magician in the universe, because she had learned the Secret Name of Ra from the god himself. Isis was the sister and wife of Osiris, sister of Set, and twin sister of Nephthys. She was the mother of Horus the Child (Harpocrates), and was the protective goddess of Horus’s son Amset, protector of the liver of the deceased.

Isis was responsible for protecting Horus from Set during his infancy; for helping Osiris to return to life; and for assisting her husband to rule in the land of the Dead.

Her cult seems to have originally centered, like her husband’s, at Abydos near the Delta in the North (Lower Egypt). She was adopted into the family of Ra early in Egyptian history by the priests of Heliopolis. From the New Kingdom onwards (c. 1500 BC) her worship no longer had any particular identifiable center, and she became more or less universally worshiped, as her husband was.

Powers

Isis had great powers of healing, protection, and magic. She could even cast spells on Ra. An example of her powers is when Isis brought Osiris back to life for one night. The powers were only strong enough to bring Osiris back for a single night.

Physical Appearance Isis had a sun disk on her head. She appeared as a queen! Sometimes Isis is called the egg of the goose because Geb is the father of Isis and goose represents him? She also had a throne on her head to symbolize she was a queen!