See under Clevner.
Frequently used synonym (second name) but also homonym (collective name) for grape varieties. There is no independent grape variety with this/these name(s). The origin of the name is unclear, although there are some hypotheses. One of them is that the name was derived from the Italian municipality of Chiavenna in Lombardy, which in ancient times bore the Latin name Cleven. However, the assignment of the manifold synonyms of different spellings to the individual grape varieties cannot be...
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