Sindarin 

belerieth

noun. belerieth

fem. n. >> #balar

Sindarin [(PE17 Sindarin Corpus) PE17:139] -. Group: Parma Eldalamberon 17 Sindarin Corpus. Published by

belair

proper name. Sindar

A term appearing in Notes on Names (NN) from 1957 (PE17/139). It had the singular forms belerion, belerieth, belair and plural forms belair, balarwaith, beleriath. It appears to be a name used for the Sindar in contrast to the Noldor and Nandor. It perhaps refers to the island of Balar from which Beleriand was named; hat-tip to Parmandil for this suggestion.

Sindarin [PE17/139] Group: Eldamo. Published by