An Etymological Dictionary of the German Language/Annotated/Köcher
Köcher, masculine, ‘quiver,’ from Middle High German kocher, Old High German chohhar, masculine, ‘quiver,’ yet also generally ‘receptacle’ with the variants, Middle High German kochœre, Old High German chohhâri, Middle High German koger, keger, with an abnormal g apparently in harmony with the obscure Old Icelandic kǫgurr ‘quiver’?), preserved only in kǫgursweinn, kǫgurbarn; Old Icelandic kǫgurr, ‘quilted counterpane, coverlet,’ is an entirely different word, and is connected with a remarkable German form Köcher, ‘cover.’ Anglo-Saxon cocur, Middle English coker, ‘quiver’; also in Middle English and English quiver, from Old French cuivre, which is again derived from the Teutonic word (Teutonic kokro-, whence Middle Latin cucurum, ‘quiver’).