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Cognomen Lass (Lass , Ласс , לס ) , around the world, is quite a common surname. The family name Lass is characteristic of Guernsey, where it is quite a common surname, Estonia, and Tunisia, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Germany, the United States, and Algeria. Also, Lass is the forename as well as the last name.