Ilk. gelion adj. “bright” (Category: Bright)
An adjective meaning “bright” derived from the root ᴹ√GAL¹, the basis of the river name Gelion¹ (Ety/GYEL). There isn’t enough information to deduce its primitive form, but Helge Fauskanger suggested *✶galjānā (AL-Ilkorin/gelion), which seems reasonably plausible.
Reference ✧ Ety/GYEL ✧ “bright”
|ᴹ√GAL > gelion||[galjānā] > [galjāna] > [galjōna] > [galiōna] > [geliōna] > [geliōn] > [gelion]||✧ Ety/GYEL|