The white grape variety (breeding no. Geisenheim 9-93, GM 9-93) is a new variety between Riesling x Knipperlé according to DNA analyses published in 2013. The paternity of Grüner Silvaner stated in the breeding list turned out to be false. The name is derived from the Ehrenfels ruins near Rüdesheim. The cross was made in 1929 in Geisenheim by Dr Heinrich Birk (1898-1973). Plant variety protection was granted in 1969. The variety was a crossing partner of the two new varieties Ehrenbreitsteiner and Prinzipal.

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