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Last name Ertel (Ertel , Ертель , Эртель ) , all over the world, is quite a common family name. The family name Ertel is characteristic of Germany, where it is quite a rare surname, New Zealand, where it is a rare surname, and Austria. Not in comparison with a country's population, the name is most common in Germany, the United States, and Brazil. Much less frequently, Ertel is the forename as well as the last name.