Pierre Basler, founding member of the association, chose the following name when it was founded in December 1999: "International Working Group for the Promotion of Fungus-Resistant Grape Varieties". In the first writings by Pierre, he still writes about interspecific grape varieties. In June 2000, the abbreviation PIWI appeared for the first time after the designation "International Working Group for the Promotion of Fungus-Resistant Grape Varieties".
Later, Pierre Basler wrote about PIWI wines shortly before his illness. In January 2004 there was an emergency meeting after Pierre's illness. After Pierre's retirement, there were long discussions about names. Mathias Wolff then ended this by declaring:
"We do have a name" why don't we appear with this as: "PIWI-International" . According to old documents, PIWI-International appeared for the first time at the Intervitis in May 2004 with a tasting offer for PIWI wines. The PIWI International logo was probably created at this point in time, as this appears in the documents from mid-2004.
In summary, Pierre Basler switched from interspecific to PIWI in 2000. Mathias Wolff then clearly ended the discussions in 2004 and introduced PIWI as the name of the club.
Edy Geiger in June 2022