Which Gamemaker was executed for letting both Katniss and Peeta win?

The Gamemaker who was executed for letting both Katniss and Peeta win was not named in the books. The Hunger Games trilogy never reveals the Gamemaker's identity. We only know that President Snow ordered the execution and that it was a severe punishment for defying the rules.

The execution serves as a reminder of the power of the Capitol and its ruthless methods for maintaining control.