Earth is the only planet in the solar system that is not named after a Greek or Roman god. Instead, the name Earth is derived from Old English and Germanic languages.
The exact origin of the name Earth is not known, but it may come from the Old English word "eorthe," which may stem from the Hebrew word "eres," meaning ground. The other planets in the solar system were named after Greek and Roman gods, including Mercury, the god of commerce; Venus, the goddess of love and beauty; and Uranus, the god of the heavens. The International Astronomical Union is currently responsible for naming newly discovered planets and their moons.