As you're aware, I come from Ferelden, in Thedas. The most common religion there, which is also the one I was raised in, is Andrastianism. The organized form of it is called the Chantry.
After death, the body is burned and the soul is said to cross the Veil into the Fade, the spirit world. The Chantry teaches that the souls of the faithful pass through the Fade and come to another realm, reaching rest eternal at the Maker's side. Those who were wicked are said to be cast into the Void, an eternal nothingness within the Fade. We know the Fade and the Veil are real - they can be touched and seen - but if a world beyond exists, no one has come back to tell of it. As far as I know, the Avvar are the only people in Thedas who believe in a soul's rebirth.