The white grape variety originates from Italy. Synonyms are Greco Bianco, Greco Bianco di Cirò, Greco del Cirotano, Guardavalle di Passuli, Guaradavalle di San Marco, Montonico di Rogliano, Passulara, Uva da Passito, Uva Greca and Vardavalli. It is named after the town in the province of Catanzaro (capital of Calabria).

According to DNA analyses carried out in 2021, it originates from a presumably natural cross between Mantonico Bianco x unknown parent variety. It must not be confused with the varieties Greco, Greco Bianco or its parent variety Mantonico Bianco due to the same synonyms or morphological similarities.
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Markus J. Eser
Weinakademiker und Herausgeber „Der Weinkalender“