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About us

The McGuire DNA Project was established in June 2004 with six initial participants. We have grown by about 17 new participants per year since 2004. We now have more than 100 participants and 45 distinct McGuire lineages represented in the project. From this large worldwide sampling of McGuire yDNA, we have firmly established the "baseline" 67-marker yDNA pattern for the original Maguidhir patriarch who lived in County Fermangh, Ireland c.950 AD. Descendants of the first Maguidhir patriarch ruled over County Fermanagh, Ireland from about 1280 - 1605, beginning with Donn Carrach Maguire d.1302, the first of the great Maguire Lords of Fermanagh. For more information of Maguir origins, see the following website: