Who would’ve known? “Corbu” (and its counterpart, “petit Corbu”) is a variety of red grape used for winemaking in the Pyrenees. Of course, it’s “very minor and always blended”:http://www.french-regional-wines.co.uk. Saw it on a wine list last week and, well, wasn’t terribly pleased with the inky, tannic result, but that could have been the blend.