Horus is one of the oldest and most significant deities in the Ancient Egyptian religion, who was worshipped from at least the late Predynastic period
Predynastic Egypt
The Prehistory of Egypt spans the period of earliest human settlement to the beginning of the Early Dynastic Period of Egypt in ca. 3100 BC, starting with King Menes/Narmer....

 through to Greco-Roman times. Different forms of Horus are recorded in history and these are treated as distinct gods by Egyptologists. These various forms may possibly be different perceptions of the same multi-layered deity in which certain attributes or syncretic relationships are emphasized, not necessarily in opposition but complementary to one another, consistent with how the Ancient Egyptians viewed the multiple facets of reality.

The earliest recorded form is Horus the Falcon
A falcon is any species of raptor in the genus Falco. The genus contains 37 species, widely distributed throughout Europe, Asia, and North America....

 who was the patron deity of Nekhen
Nekhen was the religious and political capital of Upper Egypt at the end of the Predynastic period...

 in Upper Egypt
Upper Egypt
Upper Egypt is the strip of land, on both sides of the Nile valley, that extends from the cataract boundaries of modern-day Aswan north to the area between El-Ayait and Zawyet Dahshur . The northern section of Upper Egypt, between El-Ayait and Sohag is sometimes known as Middle Egypt...

 and who is the first known national god, specifically related to the king who in time came to be regarded as a manifestation of Horus in life and Osiris
Osiris is an Egyptian god, usually identified as the god of the afterlife, the underworld and the dead. He is classically depicted as a green-skinned man with a pharaoh's beard, partially mummy-wrapped at the legs, wearing a distinctive crown with two large ostrich feathers at either side, and...

 in death.