The red grape variety comes from Italy; it is one of the numerous Lambrusco varieties. Synonyms are Anrè, Caruét, Corva, Croetto, Crova, Crovet, Crovìn, Moretto, Lambruso di Alessandria, Neretto di Alessandria and Stupèt. It must not be confused with the French variety César or the Piedmontese variety Corva, even if synonyms or morphological similarities seem to indicate it. According to DNA analyses carried out in 2006, parent-offspring relationships are likely to exist with the varieties Neretto di Marengo and Malvasia di Casorzo. This also refuted the presumption that it was identical to the César.