The red grape variety originates from the border region Italy/Switzerland. It is named after a place called Eyholz. Synonyms are Eyholzer Rote, Eyholzer Roter, Gross Roth, Grossroter and Hibou Rouge. In spite of apparently indicative synonyms or morphological similarities, it should not be confused with the varieties Avanà (Hibou Noir), Gamay or Troyen (Gamay de Rolampont). The parentage could not be clarified by DNA analyses carried out in 2011, but there were kinship relations to Vien de Nus from the neighbouring Aosta Valley and Freisa from Piedmont. In Switzerland, Eyholzer is counted among the Old Growths grape variety group. The late ripening vine produces an acidic white wine with strawberry aromas. It is traditionally cultivated on pergolas on less than one hectare near the municipality of Visp in the Swiss canton of Valais. In 2011, a vine at least 150 to 250 years old was found in the Valais town of Sion (Sion).
Source: Wine Grapes / J. Robinson, J. Harding, J. Vouillamoz / Penguin Books Ltd. 2012