I'm struggling to find a lot of information about the history of giants / their place in Golarion. It seems that they mostly originated from Thassilon, but is there any information from before their enslavement? Both the stone and taiga giants claim to be the first, but do they have any creation myths or lore that places them in the greater context of the world? Are they native to the Material Plane, or do they have a similar elemental origin as the giants of D&D?