Uncertain. First attested in the mid-15th century inUpper German texts asDolch, then alsoDollich, Tolch. At first mostly withweak declension (dem Dolchen). The formerly held assumption of a Slavic origin has been abandoned (olderCzechtulich is instead a German borrowing).
The word is now mostly derived ultimately fromLatindolo(“pike, dagger”),[1] but the origin of thevelar remains unclear.[2][3] It may be due to conflation with a descendant ofProto-West Germanic*dalk, *dolk(“pin, needle, clasp”), which is entirely unattested in Continental West Germanic, only being found inOld Englishdalc,dolc(“brooch, buckle, clasp”)). Another theory[4] links it toMiddle Frenchdollequin (ca. 1400), fromOld Frenchdolequin, itself likely fromMiddle Dutch*dollekijn, a diminutive ofMiddle Dutchdolle (“dagger”, mid-14th c.), likely from the Latin.[5] Compare earlyDutchdolleken,dolck,dolch (modernDutchdolk).
Dolch m (strong,genitiveDolchesorDolchs,pluralDolche)
Dolch on the German Wikipedia.Wikipediade