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Cognomen Sinden (シンデン , Sinden , Синден ) , worldwide, is quite a rare family name. The family name Sinden is characteristic of Namibia, where it is quite a rare surname, the United Kingdom, and New Zealand. Measured by absolute frequency, this name is the most popular in the United Kingdom, South Africa, and the United States. Very seldom, Sinden is the forename as well as the last name.