Pharoah is a title of a person....kinda like a King.
The Exodus account has at least 3 different Pharoahs. 2 different ones during the 10 Plagues. (They lasted around 3½ years all total)
We are talking about Thutmose or Thutmose II and etc...various ones and the precise ones are argued about....
A Pharoah himself was not a god but he was the person who had access to the gods and controlled them with his requests. However they thought that some Pharoahs were better than others at beseeching the gods to get them to do as they should. All the 10 Plagues were directly aimed at the supposed control their various gods held.
The Egyptians wrote in hieroglyphics....and their records aren't always the most complete or accurate.