Region: Middle Earth
I didn't realize until this week, but it looks like Tolkien didn't just reuse the same names from what he thought would be unpublished works, he borrowed for his poems too. Those Dwarves plagiarized the Lay of Leithian when they wrote the Song of Durin.
King Thingol sat on guarded throne
in many-pillared halls of stone:
there beryl, pearl, and opal pale,
and metal wrought like fishes’ mail,
buckler and corslet, axe and sword,
and gleaming spears were laid in hoard