|Regions with significant populations|
|São Paulo and Rio de Janeiro|
|Portuguese, English, and Irish|
|Roman Catholicism, Irreligion and others|
|Related ethnic groups|
|Other Brazilian people, White Brazilians and specially Confederados, other American Brazilians, English Brazilians and Scottish Brazilians|
|Part of a series of articles on|
An Irish Brazilian (Portuguese: Irlando-brasileiro or Hiberno-brasileiro) is a Brazilian person of full, partial, or predominantly Irish ancestry, or an Irish-born person residing in Brazil. Many of Irish immigrants in Brazil had to change their last names into an easier kind of writing based in existing Portuguese names, replacing the "O'" (originally "grandson").