GH  TH  JR  BW = 4 = IV

IV represented the Roman god Jupiter, whose Latin name, IVPPITER, begins with IV.

In Roman mythology, Jupiter or Jove was the king of the gods, and the god of sky and thunder. He is the equivalent of Zeus in the Greek pantheon. He was called Iuppiter (or Diespiter) Optimus Maximus ("Father God the Best and Greatest") As the patron deity of ancient Rome, he ruled over laws and social order.