köken: Possibly already from Middle Dutch. Equivalent to a compound of koof (from Middle Dutch kove, from Old Dutch *kovo, from Proto-Germanic *kubô (“hut, shed”)) and a less certain second element that might be hou (“friendly, favorable disposition”). Related to German Kobold. For sense 2, compare with English brownie/Brownie (“a junior Girl Scout, a junior Girl Guide”).
From Middle High German wicht, from Old High German wiht (“creature, thing”), from Proto-West Germanic *wihti (“essence, object”). Cognate with Dutch wicht, English wight, Swedish vätte, and Icelandic vættur.