Born in 2338 of the Third Age, Nain II was the son of Oin I. Nain II was of Durin's Line. Nain had two sons named Dain I and Borin. In 2488, Oin I died and Nain II became King of Durin's Folk. At the time of Nain's reign, Durin's Folk lived in the Grey Mountains. King Nain II died in 2585 and his son Dain became King.
The Lord of the Rings, Appendix A: "Durin's Folk," pages 353, 361
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