Satakal=Alduin
Ruptga=Magnus
Sep=Lorkhan and (possibly) Mehrunes Dagon
Tu'whacca=Arkay
Morwha=Mara
Tava=Kynareth/Kyne
Malooc=Malacath
Zeht=Z'en
Diagna=none, similar to Talos' position as a mortal-turned-god
HoonDing=Shezzar/Lorkhan?
Onsi=none?
Leki=sister of Meridia?

Mind, this is a rough attempt at drawing parallels. Improvements can be made...

It's not exactly a mystery, but you've made a few mistakes.

Satakal is Anu and Padomay as a merged diety, their individual names are Satak and Akel. Ruptga is Akatosh.

From there you're right until:
Diagna is a redguard hero. With Frandir Hunding he is a member of the HoonDing, which always has two parts. The HoonDing is the enantiomorph of Yokuda, it's other occurrence is Cyrus the Restless and Prince Attor. Leki is a god unique to the Redguards (each people have some), Onsi may be also but he may also be Stendarr.

The Redguard have no apparent name for Magnus and Dibella.

Anu and Padomay. Maybe Anu on a diety is Arkay? :teehee:

Edited. My bad.

Excellent explanation, gives a lot to think about. I'm playing through Redguard and it had never occurred to consider HoonDing as the enantiomorph.

Satak-Akel - Anu-Padomai.
Satakal - Sithis-Anuiel.
No direct parallels can be used here, though, as Yoku cosmological view are differs from Tamrielic ones.

Ruptga - Auriel\Akatosh.
Zeht - Zenitar.

I guess I took the idea of Ruptga putting stars in the sky to light the way to Aetherius a little to far. Heh.

On a tangential note, I've always liked the idea of considering Leki a Yoku anologue of Dibella, because who could teach the Raga beauty if not the queen of swordplay? (Just for the record, this is not suggested by anything.)