The Porcia's family originates from the feudal family of Prata, located in a castle that once stood in the present Prata di Pordenone. At the beginning of the 13th century, Gabriele and Federico, the children of Guecello I of Prata, defined the boundaries of their possessions. The house in question descended from the first, who bought the castles of Porcia and Brugnera, belonging to Prata at least since 1077. The lineage of the second continued to be called Prata. After fighting with the Venetians, the family ended up in exile and was extinct in the sixteenth century.
Other feudes belonging to this house were in the Treviso region. In fact, the members of the family covered the office of avogari (goods administrators) for the bishop of Ceneda and the bishop of Concordia.
Confirming their prominent role in the history of Friuli and the Marca Trevigiana, the Porcia were related to other important families such as Romano, Carrara, Camino, Torre, Visconti, Scaliger, Savorgnan, Polcenigo, Colloredo, Fugger and Stahrenberg.
With the arrival of the Serenissima in Friuli, the family spontaneously submitted to the Republic (1418), thus maintaining the feudal power on Brugnera and Porcia until the arrival of the French. Since 1470 there were also appointed to the feud around the Castle of Ragogna. As written before, the other branch of Prata, which opposed resistance to Venice, suffered the consequences.
Among the Porcia's members we can remember Silvio, who stood out in the Battle of Lepanto; Ferdinand, who received political assignments in Austria and was named Prince of the Holy Roman Empire in 1662.