Ogdoad n. : A thing made up of eight parts.

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Taxonomy
Ogdoad, myth, god Ra, interaction, entity, god, Atum, the egg, free encyclopedia, Khepri, Egyptian deities, creation myth, Silence, gives birth, Valentinian, Gnostic, the cult, Egyptian history.

Defination from the web:
Ogdoad (Greek "ογδοάς", the eight-fold) were eight deities worshipped in Hermopolis during what is called the Old ... These aeonnic pairs comprise the Fullness of Godhead (Pleroma), and the first eight Aeons that have been expounded here are the Valentinian Ogdoad.[1] ...