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Last name Sash (Sash , صاصه , Châssis ) , worldwide, is quite a rare cognomen. The cognomen Sash is characteristic of Jamaica, where it is quite a rare surname, Oman, where it is a rare surname, and Sri Lanka. Measured by absolute frequency, the name is most common in Egypt, the United States, and India. Also, Sash is the forename as well as the last name.