There are 1, 368 vine varieties. Jancis Robinson wrote a book about ALL OF THEM. Then she wrote this article in Financial Times talking about the book. Here is a paragraph from that article.
"The origins of the widely planted Zinfandel grape in California, for example, were hotly disputed for more than a century. Some claimed they must be American, others that they were Hungarian or Austrian. Several books have been substantially devoted to uncovering exactly who imported the cuttings into the US and where from. In our book, thanks to the discovery of a single vine growing in the garden of an elderly lady south of Split in Croatia, we reveal that its original name is in fact Tribidrag, the etymological discovery I treasure most..."
It's like an episode of Mutual of Omaha's Wild kingdom.
Here's a bit more, if you're feeling a little nerdy today.