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Family name Cuc (Cuc , แตงกวา ) , around the globe, is a common cognomen. The family name Cuc is habitual in Guatemala, where it is quite a common surname, Romania, and Macao, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Guatemala, Romania, and Vietnam. Much less frequently, Cuc is the forename as well as the last name.