Meaning "the Throne", the seat for kings. The hieroglyph depicting her name resembled a "throne" or "seat", she is associated with the kingship and seen as the "Mother of kings". First mentioned in Dynasty IV when she was known in myth as the sister and spouse of Wesir (Gr: Osiris), mother of Heru (Gr: Horus) and sister of Nebt-Het (Gr: Nephthys) and Set. In this relationship she is one of the Heliopolitian Ennead.

She was called the "Mistress of Magic" as in myth she managed to trick Re into telling her his secret name, thus getting access to great knowledge.

Together with her sister Nebt-Het (Gr: Nephthys) she is frequently seen on coffins in the form of a kite with outstretched wings protecting the deceased or standing protectively behind the throne of Wesir.

She sometimes appears as the scorpion goddess Serket and as the star Sopdet (Sirius, Gr: Sothis) she is considered to bring on the inundation.

In the New Kingdom Aset and Het-Hert (Hathor) began to merge and could only be identified, not by their iconography, but by their hieroglyphs.

In Roman days she was known as "Isis of Ten Thousand names", her aspects as "Mother Goddess" overriding that of the protector of the deceased. At this time her cult spread around all of the Mediterranean world.

Image sources:
Mourning Isis - Ägypten, die Welt der Faraonen, Könemann: Hildeshiem, Pelizaeus-Museum, 1584.
Nebt-Het, Serket, Nit - The Tomb of Nefertari, Mohamed Nasr and Maroi Tosi.