Nahald

Nahald 'secret' is the original Hobbit name of Déagol, the Stoor who originally found the One Ring and was murdered by Sméagol (Trahald).

In Déagol's days (mid-25th century Third Age) the hobbits who lived in the Vales of Anduin used language which was related to the Northern tongues of the Men.

Source: LoTR III, Appendix F II, p. 1136²⁰⁰⁵.