Atum

Even a god such as Atum, the awesomely powerful "lord of totality", whose favourite party trick was to fellate himself, comes across as being just a little bit dull.

The Rise and Fall of Ancient Egypt by Toby Wilkinson; Myths and Legends of Ancient Egypt by Joyce Tyldesley; and Egyptian Dawn by Robert Temple Tom Holland 2010

Atum was absolutely a god in the Egyptian pantheon.

Secrets of the Crypt - Arthur Phillips talks about how he came to write The Egyptologist 2010

And the king who takes this god’s name, Atum-hadu or Atum-Is-Aroused?

Secrets of the Crypt - Arthur Phillips talks about how he came to write The Egyptologist 2010

The priests of Thebes claimed that their god Amun was the father of Atum, and so the first.1

Modern Science in the Bible Ben Hobrink 2011

So it is not unreasonable to think of a king with Atum-hadu’s history choosing to name himself, essentially, after the act of Creation.

Secrets of the Crypt - Arthur Phillips talks about how he came to write The Egyptologist 2010

According to the priests of the city of Heliopolis, the god Atum had spontaneously arisen from the primeval waters.

Modern Science in the Bible Ben Hobrink 2011

The priests of Thebes claimed that their god Amun was the father of Atum, and so the first.1

Modern Science in the Bible Ben Hobrink 2011

In Lise Manniche’s Sexual Life in Ancient Egypt, there are some reproductions of ancient art, and in one, Atum shows that he really merits the epithet "accomplished one."

Secrets of the Crypt - Arthur Phillips talks about how he came to write The Egyptologist 2010

The priests of the city of Memphis claimed that their supreme god, Ptah, was the father of Atum, and so existed before Atum!

Modern Science in the Bible Ben Hobrink 2011

And while depictions of him varied, and there are different myths, the most common version of Egyptian Creation has Atum as the first god.

Secrets of the Crypt - Arthur Phillips talks about how he came to write The Egyptologist 2010