Board Thread:Lore Discussion/@comment-6702118-20140722142914/@comment-24999978-20140801203324

“You will eat nothing here, aspect Ald,” said the Aka-Tusk, sensing trouble. “Do not forget that it was Heaven itself that shed you from me.” - The Seven Fights of the Aldudagga.

Alduin is not the first born of Akatosh in the sense of the Imperial aspect of the Time God, 'Akatosh' term is just likely used because it was the citizens of Tamriel most identify the Oversoul with in the Fourth Era. Alduin is older than Akatosh is, anyway, though I do suppose being a Time God does make those matters a tad less relevant.