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Last name Shia (Shia , شايا , Шая ) , around the globe, is quite a common surname. The last name Shia is characteristic of Malaysia, where it is quite a common surname, Hong Kong, where it is quite a rare surname, and Singapore. Not in comparison with a country's population, it is commonest in Malaysia, Indonesia, and the United States. Very seldom, Shia is the forename as well as the last name.