It's not possible to answer this question for two reasons.
Firstly, in the ancient and medieval period there were dozens, if not hundreds of kings, ruling different areas around the world. It's not possible to pick one at any particular time who was the "first".
Secondly, there is no set definition of when the medieval period began, or whether it was different for different countries. Unless you are talking about one specific country, it is not possible to select one king as the "first".
King William I Was a Ruler Of great Britain in The Medieval Times. King William I Was a Ruler Of great Britain in The Medieval Times.
The King, Pope and some medieval countries had emperors.
Henry VIII was the King of England in the Tudor era, which was later that what we would call medieval times.
King Richard was around during the medieval times.
In medieval times, you could have been dragged out and hung, had your head chopped off, or become the king.
King William I Was a Ruler Of great Britain in The Medieval Times. King William I Was a Ruler Of great Britain in The Medieval Times.
King Stephen
There was no "rank". He was king and that was it.
king William
The King, Pope and some medieval countries had emperors.
The first king lived in medieval times
The kings role in medieval times which is the greatest one of the kings roll is the leadership.
Henry VIII was the King of England in the Tudor era, which was later that what we would call medieval times.
He was a French King in medieval times.
In medieval times people had to show extreme deference to a King and Queen. They had to bow, and only speak when they were spoken to.
People in medieval times has to show deference to the king and queen. They had to speak only when spoken to, and usually had to bow and curtsy.
King Richard was around during the medieval times.