Hawkhit was a dragon that lived during the Age of Fire.
He was a dragon, that lived in the Isle of Ice on the time of the Dragon-riders. He was part of the "fighting stock", being a castrated male dragon.
He was met by AuRon, in the caves of the Isle.
He didn't took active part in the Insurrection on the Isle of Ice, and probably remained for some time close the Isle as the other former fighting stock dragons.
It's unknown if he was the dragon chosen by Epinonia or Alhala as their mate and as adoptive father for clutches sired by Starlight.