An Etymological Dictionary of the German Language/Groschen

by Friedrich Kluge

Groschen, m., ‘groschen (11/5d.),’ from the equiv. MidHG. gros, grosse, m.; like Fr. gros, ‘groschen,’ from MidLat. grossus; related to the common Rom. adj., Ital. grosso, ‘thick’ (comp. Fr. gros), just as MidLG. grote (whence E. groat), ‘groschen,’ to groß.