The exact origin of this white grape variety is unknown. Synonyms are Krainfranke and Philipp Cuntzrebe. She may not be with the Sylvaner be confused, which was also referred to as Grünfränkisch earlier. According to the period 2014 to 2016 DNA analysis (Dr. Erika Maul vom JKI ) the species comes from a presumably natural cross between Auxerrois x Kövidinka, It is a very old variety that has already been considered extinct. It was founded in 2009 by the diplomologist Andreas Young rediscovered. This means that can be derived from a 300-year-old variety description that not Riesling, but most likely Grünfränkisch the actual grape variety of the Liebfraumilch was. Already in the 16th century, the Grünfränkisch for the South palatinate mentioned. The history of this grape variety goes back to the antiquity and found her home on northern Hungary Rhine, She was one of the so-called Frankish, so qualitatively "better" varieties.
Source (Andreas Jung) and picture: Historical grape varieties