Amun-Ra-Min became a composite god as his cult spread over Egypt and subsumed
other gods
Originally, he was the deification of the concept of air, and one of the four
fundamental concepts of the primordial universe in the Ogdoad Creation Myth.
Amun means the hidden one, as the air and the wind is not seen. His original
depiction was a frog-headed god and his invisibility was represented by the
color blue, the color of the sky. The color blue is often used for Amun's image.
As the god of air, he came to be associated with the breath of life, which
created the ba, particularly in Thebes. By the First Intermediate Period he
was known as the creator god, titled Father of the Gods, in Thebes. As the crator
god, his Theban wife was the local Devine Mother Mut.
Amun, the creator god, was depicted in human form, seated on a throne, wearing
on his head a circlet from which rise two straight parallel plumes.
With the eviction of the Hyksos rulers from Egypt, by the
armies of the Theban rulers, the cult of Amun spread over Egypt. By defeating
the opressive Hyksos, Amun was viewed as upholding the rights to justice.
Since he upheld Maat, those who prayed to Amun were required first to
demonstrate that they were worthy, by confessing their sins. Here Amun
is presented with a statue of Maat.
Amun became thought of as a fertility deity when the Land
of Kush was absorbed. Their main god was a fertility diety. Therefore,
He absorbed the identity of the Egyptian fertility god Min, becoming Amun-Min.
As Amun's cult grew bigger, Amun rapidly became identified with the chief
God that was worshipped in other areas, Ra-Herakhty, the merged identities
of Ra, and Horus, becoming Amun-Ra. As Ra had been the father of Shu,
and Tefnut, and the remainder of the Ennead, so Amun-Ra became the father
of the Ennead. Here are the three forms of Amun.