Sindarin 

-ian

regional ending

pl1. -ien _ suff. _regional ending. -ien was often used of a single varied region (e.g.Anórien, Ithilien). Such words were still pl. with article (in Anórien). >> -iand, -ion

Sindarin [(PE17 Sindarin Corpus) PE17:42] < _yandē _a wide region or country. Group: Parma Eldalamberon 17 Sindarin Corpus. Published by