I have been researching this all week to no avail. So I'm assuming there is no real answer. I'm hoping someone can help me sort this out.
As we all know the Ennead, consisted of Atum, Shu, Tefnut, Geb, Nut, Osiris, Isis, Set, and Nephthys. (where were these originally worshipped?) http://touregypt.net/godsofegypt/ennead.htm
The Ogdoad consisted of Nun, Naunet Kuk, Kauket, Hu, Atum(who later becomes Ra?), Amun and Hauhet. They were primarily worshipped in Heliopolis. http://touregypt.net/godsofegypt/ogdoad.htm
In some stories, Bast marries Ptah and the have two sons, Nefertem and Mahes.
http://www.touregypt.net/godsofegypt/mahes.htm http://www.touregypt.net/godsofegypt/bast2.htm
In other stories it states that Nefertum is the son of Ptah and Sekhmet sister of Bastet who later becomes Ra?
http://www.touregypt.net/magazine/mag10012000/mag4.htm
Luv & Huggs,
Signed confused