An Etymological Dictionary of the German Language/erwähnen
erwähnen, vb., ‘to mention, call to notice,’ formed from the equiv. MidHG. gewęhenen, OHG. giwahinnen, giwahannen (pret. gi-wuog, partic. giwaht and giwahinit), allied to OHG. giwaht, ‘mention, fame.’ Goth. *wahnjan belongs to the root wok, wō̆q (Teut. wah), ‘to speak,’ which is widely diffused in the Aryan languages. Comp. Lat. vox, ‘voice,’ vocare, ‘to call,’ Gr. ὅσσα for ϝόκjα and ὁπ- (for ϝοπ), ‘voice,’ ἔπος (for ϝέπος), ‘word,’ Sans. root vac, ‘to say, speak.’ In Teut. this old root was not so widely developed.