Cognomen Магуайр (Maguire 
, Магуайр 
, Maguayr 
) , around the world, is a common surname. The family name Магуайр is characteristic of Ireland, where it is a common surname, Australia, 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 most frequently occurs in the United States, the United Kingdom, and Ireland.