User blog comment:Pelinal Whitestrake/About Aka, Lorkhan and broken Windows/@comment-11345660-20140209010228/@comment-13446185-20140211034559

'What evidence do we have that Tsun is the Nordic version of Zenithar? Is he not his own god?'

Partially process of elimination.

these primitive people actually worshipped the divines as we know them, just in the form of these totem animals. They deified the hawk, wolf, snake, moth, owl, whale, bear, fox, and the dragon.

-The Dragon War Alduin/Akatosh = Dragon

Shor/Lorkhan = Snake

Kyne/Kyraneth = Hawk

Jhunal/Julianos = Owl

Mara = Wolf

Sthun/Stendarr = Bear

Tsun/Zenithar = Whale

Dibella = Moth

Orkey/Arkay = Fox

Tsun is believed to be the whale as he guards the Whalebone bridge to Sovngarde (which is believed to actually be his body).