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Last name Wogan (沃根 , Wogan , Воган ) , all over the world, is quite a rare cognomen. The cognomen Wogan is habitual in Marshall Islands, where it is a common surname, Bermuda, where it is quite a common surname, and Ireland, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in the United States, Ireland, and the United Kingdom. Much less frequently, Wogan is the forename as well as the last name.