Earth is Old English and German in origin, related to the Old Saxon 'ertha', the Dutch 'aerde', and the German 'erda'.
In Norse myth: Erda ("Earth") was the germanic earth-goddess, identified with the nordic goddess Jörd.
Uranus
Prometheum was named after promethus. It's chemical symbol is PM, and it's atomic nuber is 61.
The name of the chemical element is derived from the name of the titan Prometheus in the Greek mythology.
All of the planets (except Earth) were named for ancient gods. This practice is now enshrined in tradition, and any planets discovered in the future are to be named for gods and demigods. For example, the moon recently discovered around Pluto was named Charon.
Rome is named after Romulus, the mythological founder of the city.
Callisto
The mythological god name of earth is Gaia in Greek mythology. She is considered the personification of the Earth and is also known as Mother Earth.
The mythological character, Orpheus, was a signer and lyrist. So it would make sense for a theatre to be named after a signer.
Venus is named after the roman god of beauty.
The program was named after the Greek mythological hero Jason.
The planet Uranus was named for the primordial god who personified the sky.
cupid