Folk-etymological alteration of the inherited Middle Dutch vīvalter, from Old Dutch *fifaltra, from Proto-Germanic *fifaldǭ. Germanic cognates include Old Saxon fifoldaro, Old High German fifaltra, Old English fifalde, Old Norse fifrildi. More distantly related to Latin papilio (“butterfly”), Old Prussian pepelis (“a bird”), Lithuanian papelučkà (“moth, owlling”).
vijfwouter m (plural vijfwouters, diminutive vijfwoutertje n)