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Cognomen Bayas (Bayas , Баяс ) , throughout the world, is a common surname. The surname Bayas is characteristic of Ecuador, where it is quite a rare surname, Philippines, and Kyrgyzstan, where it is a rare surname. Not in comparison with a country's population, it is commonest in India, Philippines, and Ecuador. Much less frequently, Bayas is the forename as well as the last name.