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Cognomen Brannigan (Brannigan
) , in the entire world, is quite a rare family name. The last name Brannigan is characteristic of Ireland, where it is quite a common surname, the United Kingdom, where it is quite a rare surname, and Luxembourg. Not in comparison with a country's population, the name is most common in the United Kingdom, the United States, and Ireland. Much less frequently, Brannigan is the forename as well as the last name.