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Surname Nyhan (نيهان
, Nyhan
) , in all the world, is a rare cognomen. The surname Nyhan is characteristic of Ireland, where it is quite a rare surname, New Zealand, where it is a rare surname, and Morocco. Not in comparison with a country's population, it most frequently occurs in Ireland, the United States, and Iraq. Also, Nyhan is the forename as well as the last name.