http://michaelkirkbride.tumblr.com/post/128602974278/excerpt-from-a-tesv-skyrim-design-document-with
I'm not sure if this was discussed already, but I remember a few years ago when I was more active on the forums there were debates around who the ancient Nordic totems found within the ruins and barrows represented, and how exactly the religion worked.
Dead Gods, these deities have no temples as they reside in Sovngarde. They fought and died to bring the new cycle.
Fox - Shor
Bear - Tsun
Hearth Gods, they watch over the current cycle. These deities have temples dedicated to them, and even though they are the only God's specifically represented in Skyrim temples, they probably should have had more of a prominent influence. Kyne is the most venerated deity in Skyrim. Their temples are meant to be homes/sanctuaries and less like formalized cathedrals of the Divines.
Hawk - Kyne
Wolf - Mara
Moth - Dibella
Testing Gods, these gods threaten the hearth.
Snake - Orkey
??? - Herma Mora
Twilight Gods: These deities don't need temples because it's over or almost over when they show up. The Nord's still venerate them. (We see this contradicted in Windhelm). Nord's believe Alduin shows up after the Dragonborn God appears. Talos is the only one who completely survives the next cycle.
Dragon - Alduin
Dragonborn - Talos
*Nords believe Talos aided Martin, not Alduin/Akatosh.