The Ogdoad reference article from the English Wikipedia on 24-Apr-2004
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Ogdoad

In Egyptian mythology, the Ogdoad are the eight deities worshipped in Hermopolis. They were arranged in four male/female pairs: Nu/Naunet, Amun/Amaunet, Kuk/Kauket, Huh/Hauhet.

They created the mound of dirt (Mehturt) from which Ra was born. The gods were associated with frogs and the goddesses were associated with snakes.