Cardea has a nucleus in Grottaglie (TA) and one in the area of the Strait of Messina, Cardia has a main nucleus in southern Sardinia and one in the Messina area, they should derive from nicknames connected with the Greek word kardia (heart), in some cases they can derive from Greek homonymous toponyms like the City of Kardia in Thrace, traces of these surnames have been found in Locride since the 1600s. additions provided by Giuseppe Concas CARDIA: cardìa, in phonetic language cardîa = cardìna> caldina from the Latin caldus, cardiggiài or scardiggiai or cardinai or cadrinai> warm up. Cadrinai or cardinai also in the meaning of giving a subspecies, filling with beatings! Cardina is also a hot iron. We find the surname among the signatories of the Peace of Eleonora, LPDE of 1388: Cardia Barsòlo, ville Selluri (Seddòri, Sanluri, present capital of the Province of Medio Campidano). Let us not forget, however, that the Cardìa family of Tortolì, of Iberian origin, became powerful in 1664, when Philip III of Spain, granted to Marcantonio Cardìa (of Tortolì), the knighthood and the nobility. In contemporary history we remember Umberto Cardìa, journalist, writer and politician, from Arbatax (1921.): president of the Sardinian Region, Member of the Italian Parliament and Member of the European Parliament. Currently the surname Cardìa is present in 227 Italian Municipalities, of which 71 in Sardinia: Cagliari 268, Sinnai 155, Quartu SE 97, Capoterra 77, etc.
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