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Family name Thyer (Thyer ) , worldwide, is a rare cognomen. The family name Thyer is characteristic of Australia, where it is quite a rare surname, the United Kingdom, where it is a rare surname, and New Zealand. Not in comparison with a country's population, this name is the most popular in Australia, the United Kingdom, and the United States. Much less frequently, Thyer is the forename as well as the last name.