köken: From dialectal Swedish lubber (“fat and sluggish person”), from Proto-Germanic *lubbǭ (“that which hangs or dangles”), from Proto-Indo-European *lewbʰ-, *lep- (“to peel, skin”). See also English lubber, English lob, Danish lobbes (“bumpkin, clown”).
köken: Uncertain. Related to Norwegian keila (“channel”), Middle Low German kēl (“narrow bay”). Perhaps ultimately related to Proto-Indo-European *ǵeyH- (“to break open, germinate”). Also related to Icelandic kíll (“ditch, wedge”).