The red grape variety (also Joannes Seyve D.) probably comes from France. It is named after Joannes Seyve (1900-1966), the son of the famous French vine grower Bertille Seyve (see Seyve-Villard). The parentage (parenthood) is unknown, possibly it is one of the numerous Joannes-Seyve new varieties (see Seyve Joannes). In 2016, a stock of just under one hectare was declared in the Landes department (Kym Anderson). However, it is not clear exactly which variety is involved.
Serious sources on the internet are rare - and Wine lexicon from wein.plus is one such source. When researching for my articles, I regularly consult the wein.plus encyclopaedia. There I get reliable and detailed information.
Thomas Götz
Weinberater, Weinblogger und Journalist; Schwendi