I knew it. I overlooked it. The Dwarves were among my first thoughts and I was not clever enough to look up if there are any without the "I." or "II." in their names who have the same name. *sigh*
Of course,
Oin!!!!!!!!!!!!!!!
Great, this was surely a braincooker, if you understand what I mean.
A good training. You know how I did it? I was reading J.C.A.Tyler's Tolkien Companion and always stopping and checking when I saw two same names together. Fortunately, I stopped at G, and from Gloin it was not so far...