The Vulture King was the name taken by a number of outlaws who rose against the Iron Throne, using the Red Mountains as their base. The first rose in 37 AC at the start of the reign of King Aenys I Targaryen. In subsequent generations several other leaders of rebels and outlaws in the Red Mountains called themselves "Vulture Kings" after the original, but whether any were related by blood to the first is unknown.
According to a semi-canon source, one Vulture King may have been a Blackmont. Which one he was is unknown.
The first Vulture King was a Dornishman who rose against Aenys I Targaryen. He was defeated through the Vulture Hunt.
A later Vulture King rose against Daeron II Targaryen, but was eventually defeated by Lords Caron and Dondarrion.
Gerris Drinkwater once led six Dornishmen, including Prince Quentyn Martell, to find the lair of a Vulture King.