Mag-Uidhir Clan - DNA project- Background



Guaire, Guire, Gurry, Gware, Mac Guire, Mac Quire, MacGeir, MacGiver, MacGuaidhre, MacGuaire, MacGuarie, MacGuier, MacGuire, Mac-Guire, MacGuiver, MacGurrie, MacGwier, MacGwire, MacGwyer, Mackguire, MacQuaire, Macquer, MacQuire, Mac-Quire, MacUidhir, Mac-Uidhir, Mag Uidhir, Magh Uidhir, MagUidhir, Mag-Uidhir, Maguier, Maguir, Maguire, Maguyre, Magwire, McGuaire, McGuarie, McGuier, McGuire, McGuyer, McGwier, McGwire, McGwyer, McQuire, Meguiar, Meguire, Meicc h-Uidir, M'Guaire, M'Guire, M'Gwier, M'Gwyer, O'Guaire


Below are some Mag Uidhir history facts that summarize some of what we know about the clan in Ireland.

The Gaelic spelling Mag Uidhir was first mentioned in the Annals of Ulster in 956 A.D. The word Uidhir, meaning “pale coloured one”, is the possessive form of the proper name Odhar. This Mag-Uidhir ancestor (Odhar) is listed 11 generations below Cormac, a son of Cairpri Daim Airgit, a descendant of Muredach Colla da Crioch, one of the Three Collas.  The Three Collas were warlike princes, sons of Eochy Doimhlein, son of Cairbre Lifeachar, legendary High King of Ireland, of the race of Eremon.  They conquered most of the area known as Ulster.

In the Book of Ballymote, written in 1390AD - Cairpri Daim Airgit (Argait), King of Airgíalla, (or Kingdom of Oriel) died 513AD. The King had seven sons; three of them were... Cormac from whom the Maguires descend; Nadsluaigh from whom the McMahons and Carrolls descend; and Daimhin from whom the Boylans and Kellys descend.  See O'Hart, Irish Pedigrees, published in 1892 (5th edition), Vol. I, pgs. 403, 509, 514, 565, 576-578, 670, and 817. See Maguire Genealogy.

The Mág Uidhir Kings of Fer Manach.

The Maguires supplied Chiefs, Princes, and Kings to Fermanagh, from about 1264 A.D., when they supplanted the former Chieftains (O'Daimhin, or Devin), and continued in power till the reign of King James II., of England. Their stronghold, Maguire’s castle, is still in Enniskillen. The Maguire Clan ruled over county Fermanagh in Ireland for about 400 years (from about 1202 to 1607).  The Ó hEignigh and Maolruanaidh septs were noted as Kings of Fermanagh (Fhear Manach or Fear Manach in Irish) until becoming tributary to the Maguires around 1202.  And the Maguire rulership came to an end for all practical purposes in 1607 during the time of The Flight of the Earls.

Cuchonnacht Maguire (at

"The last real Irish Chieftain of Fermanagh he was also the last to give in to the English after the Nine Years War. Once he did, Cuchonnacht found he was unable to live under English rule and law. Having half his land confiscated by the Royal Commission in 1605 he left his land and travelled to the continent.

He was instrumental in the organising the Flight of the Earls, acquiring the boat in France from which they sailed. He had planned the mission for over a year and was determined to personally make sure it went to plan. Under great personal danger he sailed with the boat back to Ireland dressed as a mariner.

He was often described as a master of disguise and adventure but this would be his greatest test. Near their destination the ship was stopped by a British warship and were held for two days. They would certainly have been arrested if Maguire had not insisted the boat be disguised as a fishing vessel by placing nets and salt onboard.

Cuchonnacht Maguire died in Genoa, Italy in August 1608."

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Project Stats

Statistic Type Count
Big Y 2
Combined GEDCOMs Uploaded 10
DISTINCT mtDNA Haplogroups 21
DISTINCT Y-DNA Confirmed Haplogroups 8
DISTINCT Y-DNA Predicted Haplogroups 1
Family Finder 22
Genographic 2.0 Transfers 4
Maternal Ancestor Information 40
mtDNA 22
mtDNA Full Sequence 12
mtDNA Plus 17
mtDNA Subgroups 0
Paternal Ancestor Information 59
Predicted Y-DNA Haplogroups 32
Total Members 66
Unpredicted Y-DNA Haplogroups 0
Unreturned Kits 1
Y-DNA Deep Clade (After 2008) 18
Y-DNA Deep Clade (Prior to 2008) 7
Y-DNA Subgroups 7
Y-DNA111 27
Y-DNA12 63
Y-DNA25 61
Y-DNA37 59
Y-DNA67 47