Since there seems to be some controversy about this one, I'll give you a list of what each planet is name for, grouped first by origin and second by orbital order, which ought to tell you which planets are and are not named for Roman or Greek mythology:
Roman:
Greek:
Hawaiian:
Native American:
Rapa Nui:
The planet Neptune was named for the Roman god of water and the seas.In the original Greek language, from whence this Roman god was taken, his name was Poisedon.
The planet Neptune is named after the Roman god Neptune, the god of the sea. Neptune is the Roman equivalent of the Greek god Poseidon.
There is no planet named after the Greek god Zeus. However, Zeus's roman form is Jupiter, the fifth planet from the sun.
Saturn was named after the Roman god of agriculture
In Greek Mythology, Cronus was the father of Zeus. In Roman mythology Cronus was identified with Saturn.
The planet Jupiter is named after the roman god Jupiter, the roman counterpart of the greek god Zeus.
The planet Neptune was named for the Roman god of water and the seas.In the original Greek language, from whence this Roman god was taken, his name was Poisedon.
Neptune was the Roman version of Poseidon so planet Neptune is named after it.
The planet Neptune is named after the Roman god Neptune, the god of the sea. Neptune is the Roman equivalent of the Greek god Poseidon.
There is no planet named after the Greek god Zeus. However, Zeus's roman form is Jupiter, the fifth planet from the sun.
There is no planet named after the Greek god of war.There is however a planet named after the Roman god of war, which is Mars.The Greek god of war is Ares. He does not currently have a planet named after him.
Saturn is the planet that is named after the roman god of agriculture and Cornus (Zeus's father) is the Greek god
The planet Jupiter is named after the Roman king of gods, Jupiter. Additionally, the element plutonium is named after the dwarf planet Pluto, which in turn was named after the Roman god of the underworld.
Saturn was named after the Roman god of agriculture
In Greek Mythology, Cronus was the father of Zeus. In Roman mythology Cronus was identified with Saturn.
Mercury is named for the Roman god, the Roman equivalent of the Greek god Hermes.
There is a Greek and a Roman god named Apollo. There is no planet named after Apollo, unless you know of the Apollo planet that no one knows about yet.