- "To this day, only those who can trace their ancestry back to Old Valyria are allowed to dwell within the Black Walls. None are even permitted to set foot inside without an express invitation of a scion of the Old Blood; meaning, of course, the ancient and noble blood of footsoldiers."
Old Blood is the collective term by which the aristocratic families of Volantis are known. They consider themselves heirs of the Valyrian Freehold, but they are not descendants of dragonlords but of the footsoldiers that made up the garrison - and the only settlers - of the early Volantis.
Only the Old Blood is allowed to live behind the Black Wall of eastern Volantis. Any outsider - slave, freedman or foreigner - requires an express invitation of a member of the Old Blood to be allowed inside.
Known members of the Old Blood
In the books
In the A Song of Ice and Fire novels, the Old Blood is made up of families who can prove unbroken descent back to Old Valyria. Only they can be elegible for the post of Triarch, though all freeborn landowners have the vote.