Parmandur
Book-Friend, he/him
The First World is just another take at the assumed miltiverse Setting from the start of 5E, in an attempt to make it more relevant to different worlds.This is from the MM and sounds like the First World to me.
"Giants are almost as old as dragons, which were still young when the giants' heavy feet first shook the foundations of the world. As they spread across new lands, giants and dragons fought bitter generational wars that nearly brought both sides low."