Gods merged with Ra
As with most widely worshipped Egyptian deities, Ra's identity was often combined with other gods', forming an interconnection between deities.
Amun and Amun-Ra
Amun was a member of the Ogdoad, representing creation-energies with Amaunet, a very early patron of Thebes. He was believed to create via breath and thus was identified with the wind rather than the Sun. As the cults of Amun and Ra became increasingly popular in Upper and Lower Egypt respectively, they were combined to create Amun-Ra, a solar creator god. It is hard to distinguish exactly when this combination happened, but references to Amun-Ra appeared in pyramid texts as early as the Fifth Dynasty. The most common belief is that Amun-Ra was invented as a new state-deity by the Theban rulers of the New Kingdom to unite worshippers of Amun with the older cult of Ra around the 18th Dynasty. Amun-Ra was given the official title "King of the Gods" by worshippers, and images show the combined deity as a red-eyed man with a lion's head that had a surrounding solar disk.
Atum and Atum-Ra
Atum-Ra (or Ra-Atum) was another composite deity formed from two completely separate deities; however, Ra shared more similarities with Atum than with Amun. Atum was more closely linked with the Sun, and was also a creator god of the Ennead. Both Ra and Atum were regarded as the father of the deities and pharaohs and were widely worshipped. In older myths, Atum was the creator of Tefnut and Shu, and he was born from the ocean Nun.
Ra-Horakhty
In later Egyptian mythology, Ra-Horakhty was more of a title or manifestation than a composite deity. It translates as "Ra (who is) Horus of the Horizons". It was intended to link Horakhty (as a sunrise-oriented aspect of Horus) to Ra. It has been suggested that Ra-Horakhty simply refers to the sun's journey from horizon to horizon as Ra, or that it means to show Ra as a symbolic deity of hope and rebirth. (See earlier section #Journey of the Sun).
He is proclaimed king of the gods in the tomb of Horemheb. Pharaoh Thutmose III dedicated the pillars of Heliopolis to Horakhty.
Ra-Horakhty is very present in the Book of the Dead of the 3rd Intermediate Period. He can be seen sitting on his throne in the Book of the Dead of Nedjmet, Padikhons, Nestanebetisheru, Djedkhonsiusankh, Tameniu and in the Amduat Papyrus Inscribed for Nesitaset.
Khepri and Khnum
Khepri was a scarab beetle who rolled up the Sun in the mornings and was sometimes seen as the morning manifestation of Ra. Similarly, the ram-headed god Khnum was also seen as the evening manifestation of Ra. The idea of different deities (or different aspects of Ra) ruling over different times of the day was fairly common but variable. With Khepri and Khnum taking precedence over sunrise and sunset, Ra often was the representation of midday when the sun reached its peak at noon. Sometimes different aspects of Horus were used instead of Ra's aspects.
Montu and Montu-Ra
A very ancient god, Montu was originally a manifestation of the scorching effect of Ra, the sun – and as such often appeared under the epithet Montu-Ra. It is possible that Montu-Ra and Atum-Ra symbolized the two kingships, respectively, of Upper and Lower Egypt. Montu had several consorts, including a female aspect of Ra, Raet-Tawy. In Egyptian art, Montu was depicted with his head surmounted by the solar disk, because of his conceptual link with Ra.
Raet-Tawy
Raet or Raet-Tawy was a female aspect of Ra; she did not have much importance independent of him. In some myths she was considered to be either Ra's wife or his daughter, as well as Montu's wife.
