Apep
Apep was the main enemy of Re.
APEP F.C. was created in 1979.
Bastet was known for the fact that she protected Ra (the sun god) from the evil serpent, Apep.
Neith was in one myth the mother of Ra, Sobek, and Apep.
Apophis is the Greek translation of the Egyptian name, Apep. Apep was the personification of Darkness and chaos, which would, by default, be opposed to light and order, which Ra represented. Please don't confuse the characters on Stargate with their actual mythological counterparts.
In Egpytain myth, Apep son of Neith and brother to Ra fought every night, Apep representing the darkness and chaos and Ra as the light and sun; Ra was rarely thought to loose and a eclipse might show his victory for a time.
Neith is sometimes believed to be the mother of Ra and of Apep/Apophis (as well as Sobek); Apep is said to fight Ra every night either because he is evil and imprisoned or because Apep had been a king and Ra had overthrown him and imprisoned him. Any children of Apep are not yet known.
Battle Apep.
Apep and Set were gods whom the Egyptians viewed as evil, there are also a lot of demons which Re faced on his barge.
Ra was the patron god of Egypt, he was the god of the sun and chief of the gods and goddesses; he was a creator god and battled Apep during the dark hours of night his victory ensured the rising of the sun and the continuing of life.
Apep Seth (to a point)