The character of Dormin was apparently inspired by the biblical character Nimrod. The main connections made are the following;

* "Dormin" spelled backwards is "Nimrod".

* Nimrod was a warrior king who was said to have killed a bull with his bare hands and took to wearing its horns on his head as a crown. He is also the one responsible for the building of the Tower of Babel. In some respects, the castle in the center of the forbidden land could be seen as a representation of the Tower of Babel.

* Upon Nimrod's death he was cut to pieces and spread throughout the earth. Dormin's soul was separated into sixteen parts and sealed in the colossi, who are spread out across the world.

* After Nimrod's death, his wife, Semiramis, became known as the Queen of Heaven; she said that Nimrod had become the Sun God. Whenever Dormin is talking to Wander, the camera pans up to a large hole in the ceiling of the Shrine, showing a great deal of sunlight coming in from above.

* Semiramis had a son named Tammuz whom she claimed was a virgin birth and Nimrod reborn. This is very much like the image we are left with at the end of Shadow of the Colossus, where Mono is left with an infant with horns, possibly Dormin (or Wander) reborn.

In game, Dormin's rebirth changes his voice to male only signifying that a part of him was separated. The part that left him had a female voice and may possibly have been the one to possess and/or resurrect Mono.

http://en.wikipedia.org/wiki/Shadow_of_the_colossus#Dormin.27s_Character

Interesting find.