|Born||In or before 33 AC|
|Book||Fire & Blood (mentioned)|
Ser Alyn Bullock was a knight in service to House Targaryen. His father, Ser Merrell Bullock, was the commander of the castle garrison at Dragonstone during the reign of King Jaehaerys I Targaryen. Alyn and his brother Ser Howard served alongside their father.
When King Jaehaerys was on Dragonstone during his regency, he spent every morning until midday in the castle yard training with sword, shield, and any other armament. Ser Alyn, along with his father and brother, Ser Elyas Scales, and knights of the Kingsguard would spar with the young king.