There is considerable debate in certain circles as to whether the MacTiernans named in the Linea Antiqua in descent of Ualarg O Rourke were in fact MacTiernans or O Rourkes. Some believe all of the MacTiernans were descended from the MacTiernan of Tellach Dunchadha sept in Cavan County. In the Linea Antiqua these families are clearly labeled "MacTiernan." And there are historical sources establishing that at least one MacTiernan sept was native to that county - and probably not related in any way to the MacTiernan of Tellach Dunchadha sept of neighboring Cavan County.

The following document names a Clantyernene, who, along with the MacLoughlins and MacMureas [McMorrices], who as their inheritance, held the 16 quarters of Ylagh and the lands of Cleanlough in Leitrim County. This description of a common inheritance can hardly apply to the MacTiernans of Tellach Dunchadha in Cavan County. There are several other historical sources which place a MacTiernan sept in Leitrim or at least in Connacht (Cavan was not a part of Connacht). 1885 State Papers Oct. 3 Dublin The Compostition Book of the province of Connaught and Thomond. This book contains the Commission, 15 July 1585. The return of Byngham and the Commissioners, 3 Oct. 1585. The abstract of the composition, which was retuned into the Court of Chancery in Ireland.

The names of 41 Mc's (Macks) and 26 O's (Oes) who surrendered their Irish names and customs of inheritance, and received their castles and lands by patent, to them and their heirs, in English succession. The Macs are, M'William Eighter, M'Ne Marra Fynn, M'Ne Marra Reoghe, M'Gilly Reoghe, M'Glaneghee,M'Everhin, M'Hubberte, M'Oughe, M'William Roe, M'Cremon, M'Walter, M'Huighe, M'Edmonde, M'Gyrraughe, M'Reamon, M'Thomas, M'Vavye, M'Walter, M'Dermott, M'Padyn, M'Tybbott, M'Phillippen, M'connell, M'Glaughe, M'Tyernan, M'Keallye, M'Gravell, M'Deirmotte Roe, M'Branan, M'Kehernye, M'Evillye, M'Costolowe, M'Jordan, M'Murreye, M'Enawe, M'Loughlin M'Granill, M'Donoghe encorren, M'Donoghe cobea, M''Dermott Gall, and M'Manys. The Oes are, O'Rourk, O'Connor Sligo, O'Connor Dunne, O'Connor roe, O'Kelly, O'Flaherty, O'Male, O'Heyne, O'Maddyne, O'Dowdy, O'Harry Bwye, O'Harry Reoghe, O'Naughtyne, O'Loughlin, O'Guffe, O'Neylan, O'Murrye, O'Mannyn, O'Cowchanon, O'Byrne, O'Flynne, O'Hanlye, O'Hartye, O'Lorkan, O'Flanegane, and O'Mulrenyn.

The following pardon List of about 1609 also mentions MacLoughlins and McTiernans as followers of O Rourke, all of Leitrim County. Patent Rolls of James I ca. 1609 p. 24 Pat. 1 James I IX.-10. General pardon to Thadeus otherwise Teige O''Rourke of Leitrim, Esq., chief of his name, Thadeus otherwise Teige oge O'Rourke, gent. Donnell O'Rourke, gent. Owen O'Rourke, gent. Shane oge McLoghlin, Teige oge McLoghlin, Uny McLoghlin, Shane McCaffrie McTernan, Cahire McTernan, Chasrie McTernan, and Brian oge O'Flannagan, in Leitrim co."

Lastly, the State Paper entry for 1542 describes two MacTiernan septs in the same document. 1. MacKerwan He will give a hostage to stand to the arbitration of the Bishop of Meath, the Bishop of Kilmore (Brennensis) Sir Thomas Cusake, and another to be chosen by O'Rayley, touching all contentions between himand O'Rayley about the lands called "Talloha," Mc'Gauran's lands, and the lands of both the McKerwans. If the said arbitratiors cannot agree, the final determination shall be made by the Lord Deputy and Council. His request that O'Rayley should likewise give an hostage is granted. There is no doubt this is a reference to the MacTiernans of Tellach Dunchadha in Cavan County. A later clause in the same document lists a McTernan sept under O Rourke. This is the same passage that lists a MacCahal rewe or reagh sept under O Rourke. These genlemen here recited shall be in the peace and conduct of him and his heirs under the King:- the two McGranels, O'Mulmoy, McGlaugh, Kenalowhan, Colloflimme, McCahelrewe, O'Birne, McTernan, and McAnnauve. They are evidently to be differentiated from the MacKerwans of Tellach Dunchadha in Cavan.


Woulfe mentions a MacTiernan sept in Co. Roscommon, said to be descended from the O'Connors. Might this not instead be the MacTiernan of Corry line of the Linea Antiqua, whose territory, according to our experts, was in Roscommon County?

Woulfe (Sloinnte Gaedheal is Gall)

Mac Tigearnain - (1) a branch of the O'Connors in co. Roscommon, who are descended from Tigearnan, grandson of Turlogh Mor O'Connor, King of Ireland. (2) of a Breifney family, of the same stock as the O'Rourkes, who were formerly chiefs of Tellach Dhunchadha, now the barony of Tullyhunco, in the west of Co. Cavan (3) of a Fermanagh family, of the same stock as the Maguires, who were formerly chiefs of Clann Fearghaile.

If this is the case, then the MacTiernans of Leitrim were probably the line labeled MacTiernan Naban in the Linea Antiqua; and it was these MacTiernans who shared a common inheritance with the MacLoughlins and MacMurrays of Ylagh and Cleanlough in Leitrim County.

MacTiernan of Fermanagh (O Clery)

Genelach Meg Tigernain Cloinde Ferghail MacTiernan (related to the Maguires of Fermanagh) 1669. Flaithbertach m Toirrdelbaigh m Ferghail m Lochlainn m Donnchada m Lochlainn m Donnchada m Lochlain m Cernaigh m Tigernain m Mailruanaidh (o tait muinter Mael ruanaidh) m Maele duin m Ferghail m Cearnaigh m Lughain m Iorghalaigh m Eignigh m Corbmaic m Fergusa m Aedha m Corpmaic m Cairpre an daim argit m Eachach m Cremthainn m Feig m Dedaidh dhuirn m Rochadhae m Colla fo crith.


Baronies of Leitrim, Mohill and Carrigallan, Baronies of Drumaheir and Roscloger, McTiernan 26, McLoghlen 32, McMorrey 30, Gloghlen 5...

1591 State Papers: "The chief ordinary forces and strength of men to serve O'Rourke in his wars are, the McLoughlins, the McMorrices, and the Clantyernene. These had sixteen quarters of land amoungst them as their inheritance, called Ylaugh, and the lands of Cleanlough. These had never bonnaught of O'Rourke but only their shares of preys and spoils that were taken."

The Census of 1659 lists a townland called Clunlogher in the parish of Killargand & Clunelagher. This implies a close relation among the MacLoughlins, the MacMurrays and the Clantyernenes, i.e, a common and close descent. This would probably rule out both the clainne Tigearnain na Corradh and the Meg Tigernain Teallaigh Dunchadha, neither of whom were closely related to the other families named in the document. O Farrell calls the Clainne Tigearnain na Buannaidh "MacTernan Naban" in the Linea Antiqua. Is "Naban" a corrupt anglicisation of "Na Buannaidh?"

The O Clery genealogies terminate in this line with the grandsons of Tigearnain O Rourke 'of the river Buannaidh.' This Tigearnan O Rourke appears to be the man named in the annal entry of 1487. We have two slightly different translations of the text: the son of Mac Tighearnain and the grandson of Tigearnain from AU and FM respectively.

In the Annal entry of 1487, according to the O'Donovan translation, the grandson of Tiernan na Buannaidh was taken hostage. This is presumably the Tigernan in the pedigree above. But this Tigernan would have lived around 1300 A.D., and his grandsons no later than 1370 A.D. This annal entry in 1481 therefore cannot be describing the Tigernan in the above pedigree. In other words, no grandson of this Tigernan could possibly have been alive in 1481. Therefore this passage probably should be translated as in the Book of Ulster, i.e., Mac Tighearnain, a surname (Mac Mic Tighearnain).

No other members of this line are named in the Annals; and even if they were they would be untraceable in O Clery since his line terminates in the grandsons of Tigearnan. The line is also untraced in O Farrell past the same point. So we have a total blank until late in the 16th century, when a clantyernene are named as sharing a common inheritance with the MacLoughlins and the MacMurrays in Leitrim (probably the barony of Dumaheir).

According to the O Clery genealogies, the Clainne Tigearnain na Buannaidhe, the MacLoughlins and the MacMurrays were all descended from Amlaibh O Rourke, the son of Art son of Domhnall, which is of course the exact type of close descent (inheritance) described in the 1591 State Papers entry.

  • McTernan Naban
    • Awly O Rourke, Lord of Breffny, d. 1258
      • Melachlin O Rourke, Lord of Dartry & Clan Fearnmaigh d. 1274
        • Tigernan, a quo McTernan Naban ca. 1300
          • Murchertach, had four sons ca. 1330
            • Art
            • Bryan
            • Coconag
            • Matha ca. 1360