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Surname Sachdev (Sachdev , Сачдев ) , worldwide, is a common cognomen. The cognomen Sachdev is characteristic of Guernsey, where it is quite a common surname, Belize, and Singapore, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in India, Thailand, and the United States. Very seldom, Sachdev is the forename as well as the last name.