Late in the dynastic time-frame, the Egyptian gods were incorporated into the Greek and Roman pantheons. Towards the end of the pharaohic period the monotheistic belief systems of Christianity, Judaism and Islam supplanted the old gods.
Finally, with the rush of science, for many, religion ceased to be the best rationalization. Ironically, the philosophic tenant of 'burden of proof' now drives science to furnish the huge amount of explanation a deity may need.
Many myths surround the above, and vary with geographical location and period.
One of the oldest, Amon (god of Thebes, a fertility deity), was 'joined' with Ra (the sun god of Heliopolis) to form Atum-Ra.
The creation myth held that Atum was the first and only god. He created a son and daughter, Shu (god of the air) and Tefnut (goddess of mist and moisture).
One day they wandered off and disappeared. Atum removed his eye and ordered it to look for them. It found and returned them, Atum wept tears of joy and where they fell human being sprang up.
In its absence, Atum replaced the first eye, the Sun, with another, which he made into the eye of the Moon.
Bastet, was a daughter of Ra (sometimes said to be his sister and consort) whose cult originated in Bubastis, the capital of a province of lower Egypt. Hathor, another daughter was thought to have been the 'eye of Ra'.