Synonym for the grape variety Schwarzer Heunisch; see there.
The red grape variety probably comes from Germany. Synonyms are Blue Tokay, Gouais Noir, Hohmann 21/23/24/96, Rothhinsch, Rothhinsche, Schwarzer Heinisch, Schwarzheunsch, Schwarzhynsch, Tokay Blue and Tokay Blue. Confusingly, however, Black Heunisch is also a synonym...
The glossary is a monumental achievement and one of the most important contributions to wine knowledge. Of all the encyclopaedias I use on the subject of wine, it is by far the most important. That was the case ten years ago and it hasn't changed since.
Andreas Essl
Autor, Modena