Náin can refer to three Dwarves:
- Náin I (T.A. 1832 - T.A. 1981), the last King of Khazad-dûm, killed by Durin's Bane.
- Náin II (T.A. 2338 - T.A. 2585), who ruled Durin's folk from the Grey Mountains.
- Náin (son of Grór) (T.A. 2665 - T.A. 2799), who fought, and died, at the Battle of Azanulbizar.