S. Brithon loc. “Pebbly”
A river in western Beleriand (S/196), it is simply the adjective brithon “pebbly” used as a name (Ety/BIRÍT).
Conceptual Development: This name appeared in early Silmarillion maps from the 1930s (SM/227). In The Etymologies, the name Brithon was designated Ilkorin with the translation “pebbly” (Ety/BIRÍT), which is the source of the derivation given above.
References ✧ SA/brith; SI; UT/54; UTI; WJI
|brith||“gravel”||✧ SA/brith; UT/54|