Friedrich Kluge, An Etymological Dictionary of the German Language (1891)
“ The strong root verb (Teutonic root juk) has become obsolete in the whole Teutonic root. Joppe, feminine, ‘boddice,’ from Middle High German joppe (jope, juppe) , feminine, ‘jacket’; borrowed, like Jacke, from Romance; compare French jupe, jupon, ‘skirt,’ Italian giuppa, giubba, ‘jacket, jerkin.’ jubeln, verb, ‘to rejoice loudly, exult.’ allied to Middle High German jubilieren. This word (formed like Middle Latin jubilare, compare Italian giubilare) is still wanting in Middle High German and Old High German Jubel, ‘shout of joy, exultation,’ too, first occurs in Modern High German. ”
