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Last name 斯伦 (斯伦 , Slen ) , worldwide, is a rare surname. The family name 斯伦 is characteristic of Tunisia, where it is a rare surname, Canada, where it is a very rare surname, and Costa Rica. Not in comparison with a country's population, it is commonest in the United States, China, and Tunisia. More frequently, 斯伦 is the forename as well as the last name.