What came first the god Jupiter or the planet?

Answer 1

There a belief among scientists that Jupiter, like all of the planets developed from the solar nebula about 4.6 billion years ago. The observation of Jupiter dates back to the Babylonian astronomers of the 7th or 8th century BCE.

Jupiter/Jove as a god has evidence of being a god of Rome since 1st century BCE.

Answer 2

The planet Jupiter came first, as it was formed around 4.5 billion years ago as part of the solar system's formation. The Roman god Jupiter, on the other hand, was named after the planet and is part of Roman mythology that evolved much later.