Dragonlord was the title for members of the forty noble families that vied to actually rule the Valyrian Freehold. They were called dragonlords because they could ride and control dragons, whom they controlled with whips, horns and sorcery. They were strikingly (some say inhumanly) beautiful. It had long been the custom amongst the dragonlords of Valyria to wed brother to sister, to keep the bloodlines pure.
The Targaryens were one of the great dragonlord families, but far from the most powerful,. They are also the last known dragonlord house to survive since Doom of Valyria with dragons. They members of House Targaryen were known as dragonlords in Westeros, even after the death of their dragons.
|“||The dragonlords of the old Freehold were strong in sorcery, and lesser men defied them at their peril.||”|
|“||Our histories speak of the dragonlords of dread Valyria and the devastation that they wrought upon the peoples of Old Ghis.||”|