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Cognomen Caecilius (Cecilio , Cecil , Cecili ) , around the globe, is a common family name. The family name Caecilius is characteristic of U.S. Virgin Islands, where it is quite a common surname, Mexico, and Spain (explore the name in all countries). Measured by absolute frequency, it is commonest in Mexico, the United States, and Spain. Also, Caecilius is the forename as well as the last name.