MacGuire

MacGuire is a variant spelling of the Irish surname McGuire, which is itself an anglicized form of Gaelic Mag Uidhir (or Mac Uidhir), meaning "son of Odhar." The personal name Odhar means "pale-colored" or "sallow" — a reference to complexion. This surname belongs to the Maguire family, a prominent Irish clan based in County Fermanagh.

Etymology

The root of MacGuire is Mag Uidhir, which underwent phonetic anglicization to produce McGuire, Maguire, and variants like MacGuire. The prefix Mac- (sometimes Mag- before a vowel) indicates "son of." The spelling MacGuire uses the Gaelic-derived prefix Mac- rather than the voiced form Mc-, but they share the same derivation.

Clan History and Notable Bearers

The Maguire clan historically ruled Fermanagh as kings from the 13th to the 17th centuries. According to legend, their line traces to the 11th descendant of Colla da Chrich, a great-grandson of Cormac mac Airt, a third-century Irish high king. The clan belongs to the Oirghialla (Airgíalla), a tribe of the Laigin, the third wave of Celtic settlers in Ireland.

The variety in spelling — MacGuire, McGuire, Maguire, etc. — reflects the historically fragmented Irish orthography before standardisation. Many families used different scribal traditions, which solidified into separate surname forms upon emigration. A notable bearer of the spelling MacGuire is the fictional character William MacGuire in A Connecticut Yankee in King Arthur's Court?