Mac Keohane or Mac Keoghane or Mac Kohane - Irish / Mac Eochain. Corrupted as Ua Ceochain in the west of Co. Cork in Southern Munster only.

Mac Keon. Heremonian Dal Cuinn "northern" Ui Niaill Cenel nEogain Sept / Family branch. Especially see Mac Kean.

Mac Keon or Mac Keown or Mac Owen or Mac Ewen or Mac Cune or Mac Ewing or Owenson or Johnson - Irish / Mheic Eoghain (Descended from a son of John) A Sept / Family branch, who had their territory in Northern Connacht with one of their Septs also in Co. Galway in Southern Connacht with others nearby in Co. Roscommon, Co. Sligo and Co. Leitrim where they were prominent as Mac Keon.

Mac  Keon or Mac Eoin of the Glens. Gaelic / Mheic Eoin. Highland Scottish origins. (Descended from Eoin Bisset) who arrived from Scotland in the 13th Century AD into Co. Antrim in the north - east of the Ulster Province.

Mac Keown - Irish / Mheic Ceothain. A Sept / Family branch, who had their territory in Co. Fermanagh in the south - west of the Ulster Province. 17 variants and similar names recorded in Ulster, including Magone, Mac Cune, Mac Ewen, Mac Geown, Mac Owen and Caulfield all in Co. Down in the south - east of Ulster and Mackrone in Co. Monaghan in the south of Ulster. Also known in Ulster as Johnson, Johnstone. Mac Kone and Magowen, which see.

Mac Keoneen. Gaelic / Mheic Sheoinin. (Descended from a son of little John) Often corrupted to Ua Ceoinin and used for Jennings, which see. They were in Co. Galway and Co. Mayo in the south - west of the Connacht Province.

Kerdiff or Kerdiffe or Kerdyffe. Used as a variant for Cardiff, which see.

O Kerevan. Used as a variant for O Kirwan, which see, in Co. Laois in the mid - north - west of Southern Leinster and Co. Kilkenny in the south - west of Southern Leinster. See also O Kervon.

O Kerin or O Carey - Irish / Ua Ciarain. A Sept / Family branch, who had their territory in Co. Cork in Southern Munster and Co. Clare in the north - west of Munster Province.

O Kerin or O Kerins. See O Kieran.

O Kerlin or O Kirlin. Used as variants for O Carolan, which see, in Co. Donegal and Co. Derry in Northern Ulster.

O Kermode. Used as a synonym for O Carmody, which see, due to the spelling. Now in Co. Armagh and Co. Antrim in the east of Ulster. Also Chiefs in Co. Sligo in the north - west of the Connacht Province. Ua Carnahan was used as a variant. Ancestor: *90.Niall - of the Nine Hostages the 126th King of Tara / Ireland (Ui Niaill).

O Kernaghan or O Kearnaghan / Ui Cearnachain, Heremonian Dal Cuinn Colla Da Crioch Ui Breasail Airthir / Orior / Airthir Siol Fiachra Cassan Sept / Family branch who had their territory originally in Co. Donegal in the north - west of the Ulster Province where they were the Chiefs of Tuath Bladhaidh with the O Dallans / O Dullahan / O Dallaghan / O Dallahan / O Dolghan / Ui Dubhlachain. They were also kinsmen to the O Kealaghan / O Keelaghan / O Kealahan / Ui Ceileachain, Mac Cadden / Mac Cadigan / Mac Adam / Mac Adan / Mheic Acadhain, O Cashell / O Cassily / O Casley / O Cassell / O Cassely / O Cushley / Ui Caisile, O Madigan / Ui Madadhain, O Trainor / O Trainer / O Trayner / Ui Threinfhir. They had their territory in 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 Cassan, 88.Murray / Muireadach Colla Da Crioch - of the Two Countries / Focrith - of the Earth, 87.Eochy / Echu Doimhlen, *86.Cairbre Liffeachair - of the Liffey the 117th King of Tara / Ireland.

Mac Kernan. Used as a variant for Mac Kiernan, which see in Co. Cavan in Southern Ulster and nearby in Co. Fermanagh in the south - west of Ulster and occasionally for O Kernaghan, which see.

O Kerney. Used as a variant for O Kearney, which see, in the Ulster Province.

Kerr. Scottish origins in the Ulster Province in the 17th Century AD under James 1st during the confiscation of the 3,500,000 acres of the Heremonian Dal Cuinn "northern" Ui Niaill territories and the foreign non - Catholic plantations there.