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Cognomen บุตรกุล (Sonkul , บุตรกุล ) , globally, is a rare family name. The family name บุตรกุล is characteristic of Thailand, where it is a rare surname, Turkey, where it is a very rare surname, and India, where it is an extremely rare surname. Very seldom, บุตรกุล is the forename as well as the last name.