O Keaney or O Keany - Irish / Ua Coinne. Origins unknown as yet although they had their territory in Co. Leitrim in Northern Connacht, Co. Galway in Southern Connacht and Co. Donegal in the north - west of the Ulster Province.

O Kearnaghan. Heremonian Ui Cobhthaigh Ui Felim Dal Cuinn Colla Da Crioch Ui Breasail Airthir / Orior / Airthir Siol Fiachra Cassan Sept / Family branch, who had their territory in Co. Armagh in the south - east of the Ulster Province. Especially see O Kernaghan.

O Kearney or O Carney or O Kearny or O Kerny or O Carnie of Cashel - Irish / Ua Cearnaigh / cearnach (victorious). Heberian Dal gCais Sept / Family branch, who were Chiefs of Avon / Ui Cearney (O Kearney’s River who had their territory at Six - Mile - Bridge in the Baronies of Tulla and Bunratty in Co. Clare in the north - west of Tuaisceart Mhumhain / Thomond / Northern Munster and eventually settled into Cashel in Co. Tipperary in Aur Mhumhain / Ormond / Eastern Munster and were also in Co. Cork in Southern Munster as O Kearney. Ancestors: 84.Ailill Oluimm the 1st King of Munster. 91.Cas the King of Tuaisceart Mhumhan / Thomond. (Dal gCais) 92.Blood / Blod (Ui Bloid), 93.Cairthenn Fionn  Oge Mor, 94.Dongus who was a brother to 94.Eochy / Eochaidh Baill Dearg, 95.Ronan, 96.Dioma, 97.Ainleach, 98.Cearnach the direct male line ancestor of the O Kearneys / Ui Cearnaigh, 99.Torpa, 100.Donnell na Catha ar Fhocht, 101.Cathac, 102.Donough, 103.Donough, 104.Cu ar Phaire, 105.Mureadh, 106.Bran, 107.Seaan, 108.Bran, 109.Conor, 110.Bran, 111.Conor, 112.Seaan, 113.Donough / Donnchadh, 116.Giolla Padraic Mor, 117.Donnell, 118.Donough, 119.Philip, 120.Risteard.

O Kearney of Orghialla. Heremonian Dal Cuinn 3 Colla Sept / Family branch, who had their territory in the kingdom of Orghialla / Oriel in Southern Ulster and nearby in Co. Louth in the north - east of Northern Leinster. Ancestors: 87.Eochy / Echu Doimhlen, *86.Cairbre Liffeachair - of the Liffey the 117th King of Tara / Ireland.

O Kearney or O Carney of Co. Mayo - Irish / Ua Cearnaigh / cearnach (victorious). (Descended from Cearnach) Heremonian Dal Cuinn Ui Fiachrach Sept / Family branch, who had their territory in Co. Mayo in the mid - west of the Connacht Province. Ancestors: Cearnach, 90.Fiachra the second Dal Cuinn King of Connacht ancestor of the Ui Fiachrach Sept, *89.Eochy Mugmedon the 124th King of Tara / Ireland.

O Kearney of Co. Meath - Irish / Ua Catharnaigh / catharnach (warlike). They were a Sept / Family branch who were Chiefs of Teffia at Kilcoursey in Co. Meath in the south - east of Northern Leinster and nearby in Co. Offaly in the north - west of Southern Leinster. Many members of this Family anglicized their name to Fox  / Ua Sionnaigh, which see, which was the nickname of one of their Chiefs.

Mac Kearney or Mac Carney of Ulster - Irish / Mheic Cearnaigh. (Descended from Cearnach (victorious). Heremonian Dal Cuinn "northern" Ui Niaill Cenel nEogain Sept / Family branch. Ancestors: Cearnach, 91.Eogan the 1st King of Ailech ancestor of the Cenel nEogain), *90.Niall - of the Nine Hostages the 126th King of Tara / Ireland (Ui Niaill).

O Kearon or O Kerrane or O Kerrivane or O Kerwan or O Kirrane. Gaelic Milesian Irian Conmaicne Magh Rein Cenel Luachain Sept / Family branch of the Mac Dorcys / Mac Dorcey / Mac Darcy / Mheic Dorchaidhe, Mac Gourkeys, including the Ui Bathbairr Sept, Ui Braici Sept, Ui Buibhin Sept, Ui Chailti Sept, Ui Cianacain Sept, Ui Conbhuidhe Sept, Ui Darnaigh Sept from the Cenel Luachain, Ui Dimusaigh Sept, Ui Dubhain Sept (Inis Doiri Dubhain), Ui Erailb Sept, Ui Eturrain Sept, Ui Gabhadain Sept, Ui Mael Padraig Sept, Ui Mael Suthain Sept, Ui Muirneachain Sept, Ui Tredmain Sept, Tellach Tanaidhe, Tellach Cleirigh. O Doonan / O Donayne / O Donnan / O Doonane / O Dounan / O Dunnan / O Dynan, who had their particular territory at  Oughteragh / Carrigallen in the south of Co. Leitrim in Northern Connacht. Ancestor: 37,Ir (Irians).

 O Kearon or O Kearns. See O Kieran. O Kearon was also used in Co. Wicklow in the south - east of Southern Leinster.

Kearse or Kearsey. Used as variants for Kierse and Kiersey, which see.

O Keary or O Keery or O Carey - Irish / Ua Ciardha / ciar (black or dark brown). Heremonian Dal Cuinn "southern" Ui Niaill Sept / Family branch, who had their territory in Co. Kildare in Central Southern Leinster where they were the Chiefs of Carbury. Ancestor: *90.Niall - of the Nine Hostages the 126th King of Tara / Ireland (Ui Niaill).

Mac Keary. Used as a variant for Mac Aree, which see, in Co. Monaghan in Southern Ulster.

O Keary. Used to abbreviate O Kilkeary, which see.

Keaser -

O Keaty or O Keating - Irish / Ua Ceafhadha / ceatfhaidh (sense). Heberian Dal gCais Sept / Family branch, who had their territory in Co. Limerick in the mid - north - west of Tuaisceart Mhumhain / Thomond / Northern Munster. Many changed to O Keating. Ancestor: 91.Cas the King of Thomond. (Dal gCais).

O and Mac Keaveney or Mac Geaveney - Irish / Ua Geibheannaigh or Mheic Geibheannaigh. Heremonian Dal Cuinn Colla Da Crioch Ui Maine Sept / Family branch, who had their territory in Co. Galway in Southern Connacht and some  also anglicized as Kavanagh, which see. Ancestors: 88.Murray / Muireadach Colla Da Crioch - of the Two Countries, 87.Eochy / Echu Doimhlen, *86.Cairbre Liffeachair - of the Liffey the 117th King of Tara / Ireland. *83.Conn - of the Hundred Battles the 110th King of Tara / Ireland (Dal Cuinn).

O Keavy - Irish / Ua Ciabhaigh / ciabhach (long locks of hair). A Sept / Family branch who had their territory  in Co. Clare in the north - west of Tuaisceart Mhumhain / Thomond / Northern Munster and nearby in Co. Galway in Southern Connacht.