An Etymological Dictionary of the German Language, K (1891)
by Friedrich Kluge, translated by John Francis Davis
Kittel
Friedrich Kluge2511759An Etymological Dictionary of the German Language, K — Kittel1891John Francis Davis

Kittel, m., ‘smock-frock,’ from MidHG. kitel, kittel, m., ‘smock-frock, shirt, chemise.’ AS. cyrtel, E. kirtle, OIc. kyrtell, on account of the medial r and the abnormal dental correspondence, cannot be compared (they are allied to kurz). Its connection with χιτών is impossible. The origin of the HG. word has not been explained. The strong suspicion that it has been borrowed cannot be proved.