Synonym (also Farnento) for the grape variety Tinto Cão; see there.
The red grape variety originates from Portugal; the name means "red dog", but the meaning is unknown. Synonyms are Castellana Negra, Farmento, Farnento, Teinta Cam, Tinta Cam, Tinta Cão, Tintilla Castellana and Tinto Cam. It should not be confused with the Padeiro variety (Tinto Cão) due to seemingly indicative synonyms or morphological similarities. The parentage is unknown. According to DNADNA...
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Markus J. Eser
Weinakademiker und Herausgeber „Der Weinkalender“