Last name Макгуайр (Mcguire 
, Mcgwire 
, Макгуайр 
) , globally, is a common family name. The surname Макгуайр is habitual in Ireland, where it is quite a common surname, the United States, and Australia (explore the name in all countries). In absolute terms, it is the most numerous in the United States, the United Kingdom, and Canada.