Probably Menes, the king of Egypt who united the Upper and Lower Egypt in the 3rd millennium. He seems to be the first Egyptian ruler for whom there are historical records.
Umm you know, you asked Who was the first king? But from which country?Any specific COUNTRY KING, you want to know the name of.
I know a few countries 1st kings.
For England: Egbert Thereby
For Israel: Saul Talut?
For France:Louis XII
For Rome: Romulus
For Prussia: Frederick
There's a specialist from your university waiting to help you with that essay.
Tell us what you need to have done now!
HOPE I HELPED!