The Trollborn are so-called due to their large frames and ugly countenances, but whether the name is accurate is matter of some debate. Most believe that they are were artificially bred by the giants for battle during Ragnarök. They are certainly not now the offspring of trolls and humans; instead they are their own race, breeding among themselves.
In general, the Trollborn are not well accepted by most Asgårdian cultures. They are ugly and savage in a way that makes them repulsive to humans, dwarves, and elves; but are also viewed with suspicion by trolls, goblins, and giants.
Sadly, fully 50% of the trollborn are sterile. Thus, they are a dying race in this post-apocalyptic age. With each death, it seems more likely that the memory of them will be wiped from the Asgård forever.
Dwarven Glory 