Hvad hedder den mest fremtrædende dværg i Ringenes Herre? / What is the name of the most known dwarf in The Lord Of The Rings?

Hvem spillede ovenstående dværg i Peter Jacksons filmatisering? / Who played the dwarf mentioned above in Peter Jackson's movie?

Hvad kom Khazad-dûm til at hedde da dværgene måtte forlade byen? / What name did Khazad-dûm get when the dwarves had to leave the town?