Gelion The great river of East Beleriand, rising in Himring and Mount Rerir and fed by the rivers of Ossiriand flowing down from the Blue Mountains. 56-7, 103-4, 109, 132, 144-8, 167, 170, 174, 184, 229, 287-90 Gelmir (I) Elf of Nargothrond, brother of Gwindor, captured in the Dagor Bragollach and afterwards put to death in front of Eithel Sirion, as a provocation to its defenders, before the Nirnaeth Arnoediad. 230, 233 Gelmir (2) Elf of the people of Angrod, who with Arminas came to Nargothrond to warn Orodreth of its peril.