In Egyptian mythology, the Ogdoad ( "the Eightfold"; , a plural nisba of "eight") were eight primordial deities worshiped in Hermopolis.
The earliest certain reference to the Ogdoad is from the Eighteenth Dynasty, in a dedicatory inscription by Hatshepsut at the Speos Artemidos.
Texts of the Late Period describe them as having the heads of frogs (male) and serpents (female), and they are often depicted in this way in reliefs of the last dynasty, the Ptolemaic Kingdom.
The eight deities were arranged in four maleâÂÂfemale pairs. The names have the same meanings and differ only slightly.
The names of Nu and Naunet are written with the determiners for sky and water, and it seems clear that they represent the primordial waters.
Ḥeḥ and Ḥeuḥet have no readily identifiable determiners; according to a suggestion due to Brugsch (1885), the names are associated with a term for an undefined or unlimited number, ḥeḥ, suggesting a concept similar to the Greek aion. From the context of a number of passages in which Ḥeḥu is mentioned, however, Brugsch also suggested that the names may be a personification of the atmosphere between heaven and earth (c.f. Shu).
The names of Kek and Kauket are written with a determiner combining the sky hieroglyph with a staff or scepter used for words related to darkness and obscurity, and as a regular word means "darkness", suggesting that these gods represent primordial darkness, comparable to the Greek Erebus, but in some aspects they appear to represent day as well as night, or the change from night to day and from day to night.
The original fourth pair Amun and Amunet written with "imn", which stood for "Invisibility" or "Hidden" as a representation of the concealed potential of the primordial waters. However, as Amun's patron city Thebes influence grew and his role was gradually elevated to that of the King of the Gods, he and Amaunet would frequently be substituted for other pairs or given alternate names. Such examples would include
There is no obvious way to allot or attribute four functions to the four pairs of deities; Budge postulates that "the ancient Egyptians themselves had no very clear idea" regarding such functions. Nevertheless, there have been attempts to assign "four ontological concepts" to the four pairs: For example, in the context of the New Kingdom, Karenga (2004) uses "fluidity" (for "flood, waters"), "darkness", "unboundedness", and "invisibility" (or "repose, inactivity").