Mcguire is an Irish surname form of Maguire, meaning son of Odhar, or son of the dun-colored one.
McGuire arrives in the given-name space trailing centuries of Irish clan history. The name derives from the Gaelic *Mag Uidhir*, meaning "son of the sallow/pale-complexioned one," and was the surname of the powerful Maguire dynasty who ruled the kingdom of Fermanagh in Ulster from the thirteenth through seventeenth centuries. The Maguires were patrons of Gaelic learning, and their name appears throughout Irish annals as synonymous with cultural prestige and fierce independence during the Ulster wars against Elizabethan conquest.
As an American given name, McGuire rose in the twentieth century as part of the broader trend of honoring Irish heritage through surname-as-first-name usage. The McGuire Sisters—Christine, Dorothy, and Phyllis—were one of America's most popular vocal groups in the 1950s, and the surname became culturally bright through their wholesome television appearances. Baseball fans of a later era know Mark McGwire (variant spelling) as a slugger whose name rang through stadiums in the late 1990s.
Today, Mcguire as a first name carries a distinctly American character: Irish roots filtered through frontier informality, where a sturdy surname transplanted to the front of a name signals family pride and a refusal to let lineage be forgotten. It fits naturally into the contemporary taste for names that sound like last names—Hudson, Cooper, Carter—while retaining the Celtic consonant energy that makes it feel unlike any of them.