++easga

the moon (a name for it surviving in Braemar last century), Old Irish ésca, ésce, $$oesca, *eid-skio-; from root eid, îd, as in Latin idus, the ides, "full light", i.e. full moon (Stokes): *encscaio-, Sanskrit pñjas, light, Greek $$Gféggos, light (Strachan).