Giolla na Naomh Mór."" At 270.1-2, Leabhar na nGenealach gives an account of the privileges of Clann Chaomháin. At 271.21 (pp. 614–615), Mac Fhirbhisigh lists the patrimony of Ó Caomháin in Carra, County Mayo as ""the seven townlands of Ros Laogh, from Cluain Lis (or Leasa) Néilín to Béal Átha na Lúb, and from Béal Átha na gCarr to Muileann Toirmáin, which were obtained by Caomhán s. Connmhach from Dubhda, his brother, and by Aodh Ó Caomháin from Aodh s. Ceallach, gs. {grandson of} Dubhda, king of Uí Fhiachrach; ... and it has been the native and inherent property of Uí Chamoháin ever since, as are many other territories besides."" At 274.10 (pp. 620–621), Mac Fhirbhisgh states "The territory of Ó Caomháin is from Tuaim Dhá Bhodhar to Gleóir, and its native families are Mac Caoilleacháin, from An Carn and Ó Coitil from Baile Uí Choitil."" At 274.19 and into 275.1, he goes on to state that ""The chief sea of Ó Caomháin is Saidhin Uisce tar Abhainn, which is called Inis Screabhainn; although Clann Néill"" (a branch of the O'Dowds) ""is considered to have conquered that territory, it is not through native right that they took it but by force following the killing of Dáibhidh Ó Caomháin and Domhnall Ó Caomháin, whereupon Clann Néill were in the chieftaincy for a period, and Niall [g]s. Niall was killed by Muircheartach Fionn Ó Caomháin in revenge for [the loss of] his land."" At 276.11 Inis Screabhainn, noted as both the foregoing and Soighean Uise tar Abhainn, is called ""The chief homsestead of Ó Caomháin.""  275.17 states ""Ó Loingsigh and Ó Caomháin of An Cuirreach from Muine na bhFiadh (or Muine Dhiadh is its name today.""