Siya or SA is an ancient Egyptian god, considered the deification of the cosmogonic idea of the sacred nine of Heliopolis, perhaps equating the intellectual energies of the heart of Ptah in the cosmogonic idea of MANF. He also had a connection with writing, often appearing in human form holding a roll of papyrus, and it was believed that this papyrus was the embodiment of intellectual achievements.
Siya appears standing on a ship of the sun during its journey during the night in the texts of the other world during the New Kingdom, as well as on the images of tomb walls, with Ho (the word of creation), and Hakka (the God of magic), and these gods were considered as special abilities that help the creator, and although Hakka had its cult, siya had no independent cult at all.