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Causio seems to originate from the area of Cannole (LE), Causo is specific to the area of Melissano and Racale (LE), Cauzo, absolutely rare, is probably due to errors in transcription of the previous one, it should derive from the Greek name Kaousios latinized in Causius: " ... unde gentile nomen Causius, quo nomine appellatus est Aesculapius, qui ibi colebatur ... ", another name of Aesculapius.