YOu have to remember that people like G-C think fucking "moses" wrote the bible in hebrew in the middle bronze age. Ignorance of that level is simply stunning to behold.
However, the Egyptian terms pr-aa (meaning big or great house) were in use in the 12th dynasty although not in reference to the king but rather to the palace. The term was later applied, as you said, to the person of the ruler during the 18th dynasty.
But it was the Greeks ( always the fucking Greeks! ) who transliterated the phrase into what became pharaoh. Much as they did with turning maschiach into christos... and fuck them for that, too.
However, the Egyptian terms pr-aa (meaning big or great house) were in use in the 12th dynasty although not in reference to the king but rather to the palace. The term was later applied, as you said, to the person of the ruler during the 18th dynasty.
But it was the Greeks ( always the fucking Greeks! ) who transliterated the phrase into what became pharaoh. Much as they did with turning maschiach into christos... and fuck them for that, too.