O Kevlehan - Mac Kilbride 

O Kevlehan. See - Kivlehan.

Mac Kew. Used as a variant for Mac Hugh, which see, in the Ulster Province.

Mac Key. Used as a variant for Mac Kee, which see, in the Ulster Province. Not connected to Mackey.

Keyes. English origins. Used for Mac Kee, which see.

Mac Kibbin / Fibin / Philip - Irish / Mheic Fhibin. They were in Co. Down and nearby in Co. Antrim in the east of the Ulster Province. As Mag Fhibin it was anglicized as Mac Gibben, which see.

Kidd. English origins -

Kidney. Used as a synonym for Duane, which see, in Co. Cork in Southern Munster.

O Kieley - Irish / Ua Cadhla / graceful / beautiful. A Heberian Dal gCais Sept / Family branch, who had their territory in Co. Clare and Co. Limerick in the north - west of Thomond / Tuaiscert Mhumhain / Northern Munster. O Kiely used in Co. Limerick and Co. Waterford in the south - east of Munster. Confused also with O Keeley and O Queally, which see. Ancestor - *91.Cas (Dal gCais) the King of Thomond.

O Kielty - See Quilty.

O Kieran - Irish / Ui  Ciarain. A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Cenel Rochada Fernmag Fer Fermaighe / Farney Sept / Family branch, who had their territory at Farney in Co. Monaghan in Southern Ulster and were kinsmen to the O Creehan / O Crehan / O Creighton / O Chrichton / Ui Chriochain, Mac Crilly / Mac Croly / Mac Crolly / Mheic Raghiallaigh, O Devine / O Devane / O Devin / Ui Daimhin, O Donegan / O Donnegan / O Donnegane / Ui Donnagain, O Doorish / O Dorish / O Doris / O Dourish / Ui Dubhruis,  O Fedegan / O Faddigan / O Feddigan / Ui Feadagain, O Kelledy / O Kalladie / O Keeledie / O Keleedy / Ui Callada, O Leynan / Ui Leannain, O Loan / O Loon / O Luan / O Lamb / Ui Luain, O Larkin / Ui Lorcain, O Malinn / O Mallin / O Malyn / O Millyn / O Mullin / Ui Maoil Fhinn, O Markey / O Markay / Rider / Ryder / Ui Marcaigh, O Marley / O Marlie / Ui Merligh,  Mac Quaid / Mac Quade / Mheic Uaid, Mac Quillan / Ui Cuilinn, O Renehan / O Renaghan / O Renighane / O Ronaghan / Ui Reannachain, Mac Rory / Mac Grory / Mac Rury / Mheic Ruadri, Mac Skehan / Mac Skeehan / Thornton / Mheic Sceachain,  Mac Solly / Mac Solley / Mac Soley / Mac Sully / Mheic Soiligh, O Toal / Ui Tuathail, O Tumelty / O Tomalty / Ui Tomaltach. Ancestors - *107.Lethlobar, *106.Fogartach, *105.Murray / Muiredach, *104.Laidgnen, *103.Fogartach, *102.Duncan / Donncuan,  *101.Fogartach, *100.Ruadrach, *99.Maoilfothartaigh, *98.Artrach, *97.Aitheachda, *96.Mailduib, *95.Maoilfothartaigh, *94.Cronan,   *93.Fergus, *92.Nadsluaig, *91.Cairpre "Daim Argait," *90.Eochy / Echach, *89.Criffan / Crimthainn "Leith" / "Lethan," *88.Feicc, *87.Dega "Duirn," *86.Rochatha / Rochada, *85.Murray / Muiredach "Colla da Crioch / Focrith" - of the Two Countries, *84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair"  the 116th King of Tara / Ireland.  

O Kieran or O Kerin or O Kearns - Irish / Ua Ciarain / Ua Ceirin - ciar / black or dark brown. A Sept / Family branch, who had their territory in Co. Mayo in the mid - west of the Connacht Province who were the Chiefs of Costello. Now also in Co. Monaghan and nearby in Co. Fermanagh in the south - west of the Ulster Province. See also - O Kerrane.

Mac Kieran - Irish / Mheic Ciarain. A Sept / Family branch, who had their territory in Co. Donegal in the north - west of the Ulster Province.

O Kieran or O Kerin or O Kearns - Irish / Ua Ciarain / Ui Ceirin - ciar / black or dark brown. A Sept / Family branch, who had their territory in the east of Co. Cork in Desmond / Des Mhumhain / Southern Munster. See also O Kerrane.

Mac Kiernan - Irish / Mag Thighearnain - tigherna / chief. Same as Mac Tiernan. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Briuin Sept / Family branch, who had their territory in the O Rourke kingdom of Breifne in Co. Leitrim in Northern Connacht. Ancestors - *87.Brion the original 1st King of Connacht (Ui Briuin),*86.Eochy "Mugmedon the 124th King of Tara / Ireland.

Mac Kiernan - Irish / Mag Thighearnain - tigherna / chief. Same as Mac Tiernan. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Briuin Ai Siol Muiredaig Ui Conchobhair Sept / Family branch of the O Connors who had their territory in the east of the Connacht Province. Ancestors - *97.Murray / Muiredach "Muillethan" the 18th King of Connacht (Ui Muiredaig), *95.Relly / Rogallach the 12th King of Connacht (Ui Briuin Ai),*87.Brion the original 1st King of Connacht (Ui Briuin),*86.Eochy "Mugmedon the 124th King of Tara / Ireland.

Mac Kiernan - Irish / Mag Thighearnain - tigherna / chief. Same as Mac Tiernan.  A Sept / Family branch, who had their territory in Co. Fermanagh in the south - west of the Ulster Province. Also changed to Mac Kernan there. They were also nearby in Co. Cavan in Southern Ulster. 

Kierse. See - Kerrisk.

Kiersey. See - Keirsey.

O Kievan. Used as a variant for O Kirwan, which see, in Northern Leinster. See also O Kerevan.

Mac Kiggins or Mac Kiggan - Gaelic / Uigin / Hugo. A branch of the Joyces, which see, of Connemara in the west of Co. Galway in Southern Connacht and also used by the Stantons, which see, of Co. Mayo in the mid - west of Connacht.

O Kihegan.  See - O Kehigan.

Mac Kilbane - Irish / Mheic Giolla Bhain. A Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Fiachrach Sept / Family branch, who had their territory in Co. Sligo in the north - west of the Connacht Province. Some also changed to White / ban. Ancestors - *87.Fiachra the original 2nd King of Connacht (Ui Fiachrach), *86.Eochy "Mugmedon" the 124th King of Tara / Ireland.

Mac Kilboy. See - Mac Kelvey.

Mac Kilbride - Irish / Mheic Giolla Bhrighde (Descended from a devotee of St. Brigid) A Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Niaill Cenel Conaill Siol Lugdach Arda Midhair Sept / Family branch who used this name in the Connacht Province, but it was elsewhere anglicized as Mac Bride and Mac Gilbride, which see. Ancestors - *88.Conall "Gulban" the 1st King of Tir Connaill / Tyrconnell, *87.Niall of the Nine Hostages the 126th King of Tara / Ireland (Ui Niaill).