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Last name Kaae (Kaae , Каа ) , in all the world, is quite a rare cognomen. The cognomen Kaae is characteristic of Northern Europe, particularly Denmark, where it is quite a common surname, Estonia, where it is a rare surname, and Norway. Not in comparison with a country's population, this name is the most popular in Denmark, the United States, and Russia. Likewise, Kaae is the forename as well as the last name.