An Etymological Dictionary of the German Language/Annotated/doch

by Friedrich Kluge

doch, conjunction, ‘yet, however,’ from Middle High German doch, Old High German dŏh, ‘yet,’ also ‘although’; ŏ, on account of the toneless nature of the conjunction, is shortened from ô; Gothic þáuh, corresponding to Anglo-Saxon þeáh, English though. Scarcely from þa (variant of þata, High German daȥ) and uh, ‘and.’ Gothic þauh is literally ‘and that’?.