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Surname Mckenna (Mckenna , Маккена , マッケンナ) , in all the world, is a common family name. The surname Mckenna is characteristic of Northern Europe, particularly Ireland, where it is a common surname, Guernsey, where it is quite a common surname, and the United Kingdom (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Ireland. Very seldom, Mckenna is the forename as well as the last name.