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Cognomen Guiler (吉勒 , Guiler , Гилер ) , around the world, is a rare family name. The family name Guiler is characteristic of the United States, where it is a rare surname, Canada, and New Zealand. Not in comparison with a country's population, it is commonest in the United States, China, and the United Kingdom. Also, Guiler is the forename as well as the last name.