Narvi
Craftsman of the Dwarves. Narvi lived in Khazad-dum in the Second Age. He constructed the Doors of Durin which could only open from the outside if one said "mellon," meaning "friend." The Elf Celebrimbor illustrated all of the lettering on the Doors of Durin.
References
The Lord of the Rings, The Fellowship of the Ring: "A Journey in the Dark," page 318
The Unfinished Tales: "The History of Galadriel and Celeborn," page 235
The Unfinished Tales: "The History of Galadriel and Celeborn," page 235
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