There are a number of people who refer to each item. Off the top of my head, Demonslayer is referred to by Efram and Anastasia in Silvar, Boutell in Fort Draco (I think), Solberg, Patrick, Micah, probably Rone and some other folk. The Orb of Thralni is definitely referred to by people in the Castle (where it was stolen from) and Fort Remote, and probably others as well.