An Etymological Dictionary of the German Language, J (1891)
by Friedrich Kluge, translated by John Francis Davis
Jacke
Friedrich Kluge2507343An Etymological Dictionary of the German Language, J — Jacke1891John Francis Davis

Jacke, f., ‘jacket,’ first occurs in early ModHG. (15th cent.), formed from the equiv. Fr. jaque, whence also E. jacket; the derivation of Fr. jaque (Ital. giaco) from Teut. is quite uncertain.