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Cognomen Welch (Welch , ウェルチ , ולש ) , in all the world, is a widespread surname. The cognomen Welch is habitual in Barbados, where it is a common surname, Guernsey, where it is quite a common surname, and Belize (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in the United States, the United Kingdom, and Canada. Much less frequently, Welch is the forename as well as the last name.