O Donellan - Irish / Ua Domhnallain. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Maine Clann Breasail Sept / Family branch, who had their territory in Co. Galway in Southern Connacht. Ancestors - *86.Maine "Mor"(Ui Maine), *85.Murray / Muiredach "Tireach" the 122nd King of Tara / Ireland,  *80.Conn of the Hundred Battles the 110th King of Tara / Ireland (Dal Cuinn).

O Donnellan - Irish / Ua Domhnallain. A Sept / Family branch, who had their territory in Co. Antrim in the north - east of the Ulster Province where they were Kings.

O Donnellan - Irish / Ua Domhnallain. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Maine Bardic Sept / Family branch, who had their territory at Ross - O Donnellan near Elphin in Co. Roscommon in the east of the Connacht Province and were later on also in Co. Galway in Southern Connacht where they were Chiefs and Kings. Ancestors - *86.Maine "Mor"(Ui Maine), *85.Murray / Muiredach "Tireach" the 122nd King of Tara / Ireland,  *80.Conn of the Hundred Battles the 110th King of Tara / Ireland.

O Donnellan - Irish / Ua Domhnallain. A Sept / Family branch, who had their territory in Co. Tyrone in Central Ulster.

O Donnellan - Irish / Ua Domhnallain. A Sept / Family branch, who had their territory in Co. Offaly in the north - west of Southern Leinster.

O Donnellan or O Donelan, A Heremonian Ui Cobhthaigh Dal Cuinn Colla Uais Ui Mheic Uais Ui Tuitre Sept / Family branch, who had their territory in the west of Loch Neagh in Co. Tyrone in Central Ulster and north - west of the loch at Loughinsholin in Co. Derry. Kinsmen to O Flynn / O Lynn / Ui Fhloinn. O Furphy / O Furfie / O Furphey / O Furvey / Ui Foirbhithe, O Hood / O Houd / O Hude / O Mahood / Ohoud / Mac Hood / Ui hUid, O Mulrooney / O Mulroney / O Murrony/Ui Mael Ruanaidh.  Ancestors - *101.Floind (Ui Loind), *100.Murray / Muiredach, *99.Indrechtach, *98.Reachtabrat, *97.Mailcraibhi, *96.Maoilfothartaigh, *95.Sweeney / Suibhne, *94.Furadhran, *93.Becc, *92.Cuanach, *91.Dairi, *90.Felim / Feidlimid, *89.Fechin, *88.Fiachrach, *87.Tuirtri, *86.Eochy / Eachach, *85.Colla "Uais" the 121st King of Tara / Ireland, *84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland.

O Donnelly - Irish / Ua Donnghaile / Ui Dhonnaile - donn / brown - gal - bravery. A Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Niaill Cenel nEogain Clann Domhnaill na Dalaigh Sept / Family branch who were poets and warriors descended directly from *Donnell O Niall who died in 876 AD, who had their territory originally in Co. Donegal in the north - west of the Ulster Province where they were Chiefs and who later migrated to Bally Donnelly where they were also Chiefs in Co. Tyrone in Central Southern Ulster.  Ancestors - *90.Mongan of the Long Hair (Ui Donnelly), *89.Murray / Muiredach the 2nd King of Aileach, *88.Eogan the 1st King of Aileach (Cenel nEogain), *87.Niall of the Nine Hostages the 126th High King of Tara / Ireland (Ui Niaill).

O Donnelly. A Sept / Family branch, who had their territory in Co. Tipperary in the north - east of Ormond / Aur Mhumhain / Eastern Munster  where they were Chiefs.

Mac Donogh. See - Mac Donagh. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Briuin Sept / Family branch - who had their territory in Co. Sligo in the north - west of the Connacht Province where they were Kings. Ancestors - *87.Brion the original 1st King of Connacht (Ui Briuin), *86.Niall of the Nine Hostages the 126th King of Tara / Ireland (Ui Niaill).

O Donoghoe. A Sept / Family branch, who had their territory in Co. Kilkenny in the south - west of Southern Leinster where they were Princes.

O Donoghoe. A Sept / Family branch, who had their territory in Co. Tipperary in the north - east of Ormond / Aur Mhumhain / Eastern Munster where they were Princes.

O Donohoe - Irish / Ua Donnchada. A Sept / Family branch, who had their territory in Co. Galway in Southern Connacht and Co. Cavan in Southern Ulster.

O Donoghue or O Donohoe - Irish / Ua Donnchadha - donn / brown. A Sept / Family branch, who had their territory in Co. Galway and Co. Roscommon in the south - east of the Connacht Province where O Donohoe was mostly used.

O Donoghue or O Donahoe - Irish / Ui Donnchadha. A Sept / Family branch, who had their territory in Co. Cavan in Southern Ulster where O Donahoe was mostly used.

O Donoghue - Irish / Ua Donnchadha. A Heberian Eoghanacht Sept / Family branch, who had their territory in Co. Tipperary in the north - east of Ormond / Aur Mhumhain / Eastern Munster. Ancestors - *85.Eoghan "Mor"(Eoghanachta), *84.Ailill "Oluimm" the 1st King of Munster.

O Donoghue - Irish / Ua Donnchadha. The most prominent Heberian Eoghanacht Chaisil Sept / Family branch, who had their territory in Co. Cork in Desmond / Des Mhumhain / Southern Munster. Kinsmen to the O Mahonys, O Callaghans, and the Mac Carthys who drove them out from the west of Co. Cork to Onaght O Donoghue in Co. Kerry in the south - west of Desmond where they evolved into further Septs and were Princes. "The O Donoghue Mor" had his territory near Loch Leane at Killarney in Co. Kerry were in 1657 AD they had Ross Castle nearby until their lands there were also finally Confiscated by the English. The other Sept of "O Donoghue of the Glen" was at Glenflesk where they somehow managed to continue to survive along with their property. Ancestors - *85.Eoghan "Mor" (Eoghanachta), *84.Ailill "Oluimm" the 1st King of Munster.

O Donoghue of the Glen. A Heberian Eoghanacht Chaisil Sept / Family branch, who had their territory in Co. Cork and Co. Kerry in Desmond / Des Mhumhain / Southern Munster. Cillin there was a graveyard for un - baptized children on Madame O Donoghue's Island in Co. Kerry. Ancestors - *85.Eoghan "Mor"(Eoghanachta), *84.Ailill "Oluimm" the 1st King of Munster.

                                                                                              +On to Mac Donough - O Doocey