The Centra people know(through Ellone) that a person from the future is possessing the first sorceress.After being free this sorceress passed her powers to her daughter.The sorceress power passed through her family line.It is passed from mother to daughter(or son).
Through Ellone Vascaroon heard the name of X on the future while being on the body of someone close to him on the future.
But probably the name was mispelled by Vascaroon.
Vascaroon also perceived that X had possessed the sorceress.
The Zebalga tribe was angry because they thought they could use the sorceress against Centra.But they found she wasnīt possessed anymore.And the Centra hunt the possessor but since he/she was on the future it was of no use.
Unfortunately the sorceress was possessed again some time later along with the entire dinasty.
Vascaroon painted his visions through Elle.
This vision was pictured on the "Cowardy" painting at Ultiīs castle.
Vascaroon spelled the name "Hyne" to the Centra.
All this story was corrupted with time becaming the Legend of Vascaroon.
So we know that the approximate name for X is Hyne.
X is Hyne.