Horus was only one such god. He was regarded as the Living Pharaoh.
Horcus, I think
The rulers of ancient Egypt were called pharaohs.
The rulers of Ancient Egypt were the pharaohs.
The rulers of Ancient Egypt were known as the Pharaohs.
The rulers of ancient Egypt were called "pharohs".
The rulers of ancient Egypt had the title Pharaoh.
Ancient Egypt was protected by the Sahara from enemies
ancient Egyptian rulers were called Pharaohs.
The falcon god and protector of the ruler of the ancient Egypt was named Horus.
This question can not be answered because you have not been specific about WHICH old Kingdom you are referring to.
Pharoahs
Horus is the falcon/falcon headed god of ancient Egypt.