O Keady or Mac Cedigh or Mac Eidigh - Irish / Ua Meiceidigh. Gaelic Ithian Corca Laoidhe Sept / Family branch, who had their territory in Co. Cork in Des Mhumhain / Desmond / Southern Munster. Their name there was also corrupted to Mac Cedigh and Mac Eidigh.  Ancestors: 36.Lewy / Lughaidh, 35.Ith (Ithians).

Mac Keady or Mac Keadie or Mac Keddy or Mac Keedie or Mac Keedy or Mackeady - Irish / Mac Ceadaigh / Ceadach (a personal name) cead / one hundred). Gaelic Milesian Irian Ui Laeghis / Ui Laoighis Sept / Family branch of the O More / O Moore / Ui Mordha who are also kinsmen to O Brophys / O Brofie / Ui Broithe, O Cashin / O Kissane / Ui Casain, O Deegan / Ui Duibhgainn, O Doran / O Dorrian / Ui Deoradhain, O Dowling / Ui Dunlaing, Mac Gahan / Mac Geehan / Mageehan / Mheic Gaethain, O Harrigan / O Harraghan / O Harahan / Ui hArraghain, Ui Liathain, O Lalor / O Lawlor / Ui Leathlobhair, Mac Lee / Mac Lea / Ui Laoidhigh, O Swords / O Sord / O Sourdes / O Suard / Ui Suaird who had their territory in Co. Laois in the mid - north - west of Southern Leinster. Ancestors: 83.Fachtna, 82.Milige, 81.Bran, 80.Eircc hUbulchind, 79.Felim / Feidlimid mheic Finnchad, 78.Fiachach Uanchind, 77.Daire, 76.Rossa, 75.Ogomain, 74.Fergus, 73.Muleist, 72.Fachtna, 71.Milige ancestor of the Ui Baccan Sept, 70.Intait, 69.Lugdach Loichsi / Laoiseach Ceann Mor the direct male line ancestor of the O More / Moore / Siol Morda Sept in Co. Laois (named for him) in the north - west of Southern Leinster who were among the 7 Septs of Laois, 68.Conall Cernach - of the Victories the leader of the Knights of the Red Branch of Ulster who is the direct male line ancestor also of the Mac Guinness, Mac Gowan and many other Irian Families in the Ulster Province and the Connacht Province. (He was a contemporary of Cuchulainn), 67.Aimhirgin Larghiunach, 66.Cas, 65.Fachtna, 64.Cathbladh, 63.Cionga,  *62.Rory / Ruaidri Mor - the Greater who died in 218 BC as the Irian 86th King of Tara / Erinn (Clann - na - Rory, 37.Ir (Irians). They are now to be found mostly in Co. Galway in Southern Connacht as Mac Keady.

Mac Keaghan - Irish / Mac Tadhgain. Gaelic Milesian Irian Conmaicne Magh Rein Muintir Anghaile Sept / Family branch of the O Farrells / O Ferralls / Ui Fearghail Sept, who had their territory at Annually in Co. Longford in the north - east of Northern Leinster. Especially see O Keegan.

Mac Keaghery or Geaghery or Mac Keefry - Irish / Mheic Fiachra. Heremonian Dal Cuinn "northern" Ui Niaill Cenel nEogain Cenel Fearadhaigh Mheic Fiachra Sept / Family branch, who had their territory at Clogher in Co. Tyrone in Central Ulster. Kinsmen to the Clann Cathmhaoil / Mac Campbell / Mac Campell / Caldwell / Mac Cawell.) Ancestors: 92.Feradach, 91.Eogain the 1st King of Ailech (Cenel nEogain), *90.Niall - of the Nine Hostages the 126th King of Tara / Ireland (Ui Niaill).

Mac Keaghry or Mac Keahery. See Mac Keighry.

Mac Keague or Mac Teague or Mac Teige / Mheic Thaidhg. They were in the Ulster  Province. There are at least 14 variant forms including Mac Cague, Mac Aig and Mac Haigh, which see.

Mac Keahan - Irish / Mac Tadhgain. Gaelic Milesian Irian Conmaicne Magh Rein Muintir Anghaile Sept / Family branch of the O Farrell / O Ferrall / Ui Fearghail Sept, who had their territory at Annually in Co. Longford in the north - east of Northern Leinster. Especially see O Keegan. 

Mac Keahan. See Mac Keehan.

O Kealaghan or O Kealahan or O Keelaghan  / Ui Ceileachain / ceile companion).  Important Heremonian Dal Cuinn Colla Da Crioch Ui Breasail Airthir / Orior / Airthir Siol Fiachra Cassan Sept / Family branch who were the Chiefs of the Ui Breasail Sept who were kinsmen to the Clann Fermaighe / Mac Caddens / Mac Cadigan / Mac Adam / Mac Adan, Muintir Caiseil / O Cashel / O Cassily / O Casley /  O Cassell / O Cassely / O Cushley, O Dullahan / O Dallaghan / O Dallahan / O Dallan / O Dolghan, O Kernaghan / O Kearnaghan / Ui Cearnachain, O Madigan, O Trainor / O Trainer / O Trayner who had their territory in the north of Co. Armagh in the south - east of the Ulster Province. Ancestors: 100.Buachalla, 99.Conor / Conchobar Chorraig, 98.Mael Duin, 97.Fingin, 96.Ronan, 95.Toole / Tuathal, 94.Ailella, 93.Conall, 92.Feicc, 91.Bressal, 90.Felim / Feidlimid, 89.Fiachra Casan, 88.Murray / Muireadach Colla Da Crioch / Focrith - of the Two Countries, 87.Eochy / Echu Doimhlen. *86.Cairbre Liffeachair the 117th King of Tara / Ireland. Some also changed their name to O Callaghan in Co. Westmeath in the south - west of Northern Leinster. Also see O Keelan, which was also used to abbreviate their name.

O Kealy or O Queally - Irish / Ui Cadhla. Important Gaelic Milesian Irian Conmaicne Mara Sept / Family branch, who had their territory and were the Chiefs of the Connemara in the west of Co. Galway in the Connacht Province who were kinsmen to Mac Conneely / Mac Neela, O Cloherty / Stone, O Devany, Mac Folan / Mac Fallon / Mac Foland / Mac Folane. Ancestors: 79.Conmacc / Conmac (Conmaicne), 78.Oirbsen Mor / Orsenmar after whom Loch Oirbsen is named, 64.Fergus mac Roich the King of Ulster. 63. Ros / Rossa Ruadh - of Red Complexion, *62.Rory Mor the 86th King of Tara / Erinn (Clann Rory), 37.Ir (Irians).

O Kealy or O Keally or O Keeley or O Kiely. Heremonian Ui Laoghaire Ui Lughaidh Cu Corb Sept / Family branch, whose territory was in Co. Laois in the mid - north - west of Southern Leinster. Ancestors: 86.Cu Corb, *60.Leary / Laoghaire the 68th King of Tara / Ireland (Ui Laoghaire), *37.Eremon (Heremonians).

O Kealy or O Keally or O Keeley or O Kiely. which see - Irish / Ua Cadhla, who had their territory in Co. Waterford in the south - east of the Munster Province and nearby in Co. Limerick in the mid - north - west of Munster.

O Kealy or O Keely. Heberian Eoghanacht Ui Fidhgheinte Sept who had their territory in Co. Limerick in the mid - north - west of the Munster  Province. Ancestors: 91.Conn, 90.Brion, 89.Fichra Fidgennid, 88.Maine Munchain, 87.Ailill Fland Bec, 86.Fiachu Mullethan the 1st King of Southern Munster and 3rd King of Munster, 85.Eoghan Mor (Eoghanachta), 84.Ailill Oluimm the Heberian 1st King of Munster.

O Kealy or O Keally or O Keeley or O Kiely. Utilized also by some of the O Queallys, which see - Irish / Ua Caollaidhe, who had their territory in Co. Kilkenny in the south - west of Southern Leinster. Their territory there was taken over by the Anglo - Normans after that particular Invasion in the 12th Century AD.

O Kealy or O Keally or O Keeley or O Kiely. See O Ceile. An  Ecclesiastic Sept who had their territory in Co. Meath and Co. Louth in the east of Northern Leinster,

O Kean or O Keane - Irish / Ua Cein (Descended from Cian) A Sept / Family branch, who had their territory in Co. Waterford in the south - east of the Munster Province.

O Keane or O Kean - Irish / Ua Cathain / cath (battle). Heremonian Dal Cuinn "southern" Ui Fiachrach Aidne Sept / Family branch, who had their territory in the south of Co. Galway in Southern Connacht and nearby in Co. Clare in the north - west of the Munster Province. Ancestors: Cathan, 90.Fiachra the second Dal Cuinn King of Connacht ancestor of the Ui Fiachrach Sept, *89.Eochy Mugmedon the 124th King of Tara / Ireland.

Mac Kean or O Keane or Mac Keon - Irish / Mheic Eogain. Heremonian Dal Cuinn "northern" Ui Niaill Cenel nEogain Sept / Family branch, who had their territory in Co. Tyrone in Central Ulster. Ancestors: 107.Flaherty / Flaithbertach Ua Niaill, 106.Murtough / Muirchertach, *105.Donnell / Domhnaill O Niall the 34/37th King of Ailech and 173rd King of Tara / Ireland,  104.Murtaugh / Muirchertach of the Leather Cloaks the 33rd King of Ailech, *103.Niall Glun Dubh the 29th / 30th King of Ailech and 170th King of Tara / Ireland (O Neills of Ulster), *102.Aed Findliath the 25th King of Ailech and 168th King of Tara / Ireland, *99.Niall Frossach the 19th King of Ailech and 162nd King of Tara / Ireland, *98.Fergal the 17th King of Ailech and 156th King of Tara / Ireland, 97.Mael Duin the 14th King of Ailech, 96.Mael Fithrich the 10th King of Ailech, *95.Aed Uaridnach the 8th King of Ailech and 143rd King of Tara / Ireland, *94.Donnell / Domhnall Ilchelgach the 4th King of Ailech and 134th King of Tara / Ireland, *93.Murtaugh / Muirchertach mac Ercae the 3rd King of Ailech and 131st King of Tara / Ireland, 92.Murray / Muireadach the 2nd King of Ailech, 91.Eogan the 1st King of Ailech (Cenel nEogain), *90.Niall - of the Nine Hostages the 126th King of Tara / Ireland (Ui Niaill).

Mac Keane. Highland Scottish origins. Gaelic Irish / Mac Eain. (A variant used for Eoin / John). They settled in Co. Donegal and nearby in Co. Derry in the north - east of the Ulster Province. See also Muckian.

Mac Keane or Mac Cahan - Irish / Mheic Cathain. A Co - Arb Sept / Family branch, who had their territory in the west of Co. Clare in Tuaiscert Mhumhain / Thomond / Northern Munster where they were Co - Arbs of St. Senan. Also Chiefs nearby in Co. Tipperary in Aur Mhumhain / Ormond / Eastern Munster.

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