The red grape variety originates from the border region between Italy and Switzerland. Synonyms are Eperon and Sopron. It is probably identical to the Eperon variety, which was described by the Italian ampelographer Lorenzo F. Gatta in 1838.

The parentage of this presumably very old variety is unknown (no information in the VIVC catalogue). However, according to Wine Grapes, a DNA analysis carried out in 2011 revealed the parentage Fumin x unknown father variety. Both Vuillermin and Fumin are categorised as old vines in Switzerland.
The late-maturing vine was already threatened with extinction and was reactivated by biologist Dr Giulio Moriando.
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Markus J. Eser
Weinakademiker und Herausgeber „Der Weinkalender“