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Family name Kotera (Kotera , 小寺 , Котэра ) , all around the world, is a rare last name. The cognomen Kotera is characteristic of Czechia, where it is quite a rare surname, Ethiopia, where it is a rare surname, and Estonia. Not in comparison with a country's population, it is the most numerous in Ethiopia, Czechia, and the United States. Likewise, Kotera is the forename as well as the last name.