The term 'Roman God of Peace' refers to the deity Pax, which is a three-letter word. In Roman mythology, Pax was the goddess of peace, and was often depicted as a young woman carrying a branch of olive or laurel. She was the daughter of Jupiter, the king of the gods, and Juno, the queen of the gods. Pax was associated with the Pax Romana, a period of relative peace and stability in the Roman Empire.