It is one of the names that have been used to indicate the various products of the violin family manufactured in Germany.
Eduardo Pietro Grulli, is a great example of this misrepresentation. These products were of fine quality and marketed from Markneukirchen or Dresden, and were sold as originating in Italy. Where in Italy?, nobody knows. What confuses a buyer who does a little 'research is the fact that there was indeed a maker of the nineteenth century with the name Pietro Grulli, not Eduardo Pietro Grulli. Peter Grulli had a real luthier of Cremona, Eduardo Pietro Grulli was a brand name.