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Surname Sutha (Sutha , สุธา , สุทา ) , across the world, is quite a common last name. The cognomen Sutha is characteristic of Qatar, where it is quite a common surname, Lesotho, where it is quite a rare surname, and Sri Lanka. Not in comparison with a country's population, the name is most common in Thailand, Indonesia, and Sri Lanka. Also, Sutha is the forename as well as the last name.