Caomhán mac Connmhach, Eponym and Ancestor of the Clan Ó Caomháin of north Connacht, fl. 9th-10th century. The surname is variously anglicised as Keevan, Kevane, Keeveen, Keevans, Keaven, Keavan, Cavan. Family background Caomhán mac Connmhach and Dubda mac Connmhach were grandsons of King Donn Cothaid mac Cathail of Ui Fiachrach Muaidhe (died 772). Their father was Connchmach mac Donn Cothaid mac Cathail, who traced his descent back to the semi-legendary Niall Noígíallach (died c. 450?), via his son, Fiachu mac Néill (fl. 507-514). This made Caomhán a member of the Uí Fiachrach dynasty who produced a number of Kings of Connacht. Division of land According to Dubhaltach Mac Fhirbhisigh (263.8): Descendants Mac Fhirbhisigh, at 264.1 (pp. 598–99) states that he had a son, Cathal, and at 264.2 (pp. 598–99) gives the following genealogy: "Dáibhídh and Domhnall sons of Aodh s. Dáibhídh s. Tomás s. Giolla na Naomh s. Domhnall s. Dáibhídh s. Diarmuid s. Tomás s. Domhnall s. Tomás s. Giolla na Naomh s. Diarmuid s. Domhnall s. Cathal s. Giolla na Naomh. s. Diarmuid s. Cathal s. Caomhán, from whom are Uí Chaomháin, s. Connmhach s. Donn Cathaigh, etc." This is followed by two further genealogies: "Tomaltach, Maghnus, Donnchadh, Aodh Fionn, and Seaán, the five sons of Dáibhídh, son of that Aodh." "Tomás Óg, Tomaltach, Niall, and Cathal Riabhach:those are the offspring of Tomás Mór s. Dáibhídh s. Giolla na Naomh Mór." Privileges and territory 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,