> One interesting and obscure connection is the origin of the words "hell" and "hall", as "hall" means "covered place" and "valhalla" means "hall of the dead" from Old Norse.
It's not clear what connection you have in mind. You could make the case that "hell" and "hall" are connected to each other through their ancient ancestry, but "hell" is no more closely related to "valhalla" than it is to "hall". "Valhalla" is just a word that includes "hall".