Synonym for the Freisamer grape variety; see there. Freisamer The white grape variety is a new variety between Silvaner x Pinot Gris (which was confirmed by DNA analyses published in 2012). Synonyms are Freiburg 25-1 and (in Switzerland) Freiburger. The cross was made in 1926 by the vine breeder Karl Müller (1881-1955) at the State Viticultur...(Germany)