A chief diety is a god that rules over their pantheon. Examples include Jupiter for the Roman Pantheon.
I'm not sure if they had a chief deity, but I do know that they worshiped the war and water gods the most.
The Aztecs were polytheists. It is believed their chief deity was Quetzalcoatl, the creator sky god. Huizilopochtli was another chief deity who was the grand deity of Tenochtitlan.
Amaterasu
surya
Odin is the all father of Norse mythology.
Indra, the God of War.
supposedly the deity to succeed the Jade Emperor as chief deity in Chinese Religion. Or , so I have heard
"Surya" is the Sun god. Also comes "Agni" who is god of fire
The largest planet, which was named after the chief Roman deity, is Jupiter.
The chief deity of the Hindu pantheon is Brahma, the Creator. He is, of course, part of a holy trinity, along with Vishnu the Preserver and Shiva the Destroyer.
The god Pan was a god of hunting, and the mountains (as was the chief satyr, the minor deity Silenius). Artemis was the goddess of the hunt, and of wildlife in the forest.
A deity is a god.