Alduin is the Nordic variation of Akatosh, and only superficially resembles his counterpart in the Eight Divines. For example, Alduin's sobriquet, 'the world eater', comes from myths that depict him as the horrible, rauaging firestorm that destroyed the last world to begin this one. Nords therefore see the god of time as both creator and harbinger of the apocalypse. He is not the chief of the Nordic pantheon (in fact, that pantheon has no chief; see Shor) but its wellspring, albeit a grim and frightening one.
http://www.imperial-library.info/content/seven-fights-aldudagga
"Dagon (no longer a Leaper Demon King) screamed, "Please no! We have stolen from you so much and crammed it all back on in the craziest of places that it will take forever for me to regain my jumping kind of happiness! Especially if I can only come back to this world through auspicious days long between one and another that also require rituals! I beg you not to do this, O
Aka! I beg you one hundred thousand and eight times!""