| Families |
Ethnic Group |
Branch of |
| Keane |
|
O'Cahan |
| Keane |
IVL - Galway, South Ireland |
|
| Kearns |
|
O'Kieran |
| Keating |
IVL - Limerick, Ulster |
|
| Keating |
Normans |
|
| Keavan |
IVL - Cork |
|
| Kee |
IVL - West Ulster |
|
| Keevane |
|
O'Keevan |
| Keevane |
IVL - Cork |
|
| Kegly |
|
O'Quigley |
| Kehoe |
|
MacKeogh (Leinster) |
| Keith |
Normans |
|
| Kelly |
IVL - Scotland |
|
| Kennagh |
|
MacKenna |
| Kennealy |
|
O'Kinneally |
| Kennedy |
IVL - South Scotland |
|
| Kennelly |
|
O'Kinneally |
| Kennelly |
IVL - West Cork |
|
| Kennethson, Kenneth |
|
MacKenzie |
| Kenny |
|
MacKenna |
| Kenny |
IVL - Ireland |
|
| Kerin |
|
O'Kieran |
| Kermode |
IVL - Munster |
|
| Kermode |
Gaels |
MacDermot |
| Kevane |
|
O'Keevan |
| Kevane |
IVL - Cork |
|
| Kevans |
|
O'Keevan |
| Kilpatrick |
|
Fitzpatrick |
| Kilpatrick |
IVL - South Scotland |
|
| Kindellan |
|
O'Quinlan |
| King |
|
MacGregor |
| King |
IVL - Ireland |
|
| King |
IVL - Ireland, Aberdeen |
|
| Kintry |
|
MacEnery |
| Kinnaird |
Normans |
|
| Kinsella |
Laigin |
|
| Kirkpatrick |
|
Fitzpatrick |
| Kirkpatrick |
IVL - South Scotland |
|
| Kirwan |
|
Tribes of Galway |
| Knowlan |
|
O'Nolan |
| Lachlan, Lauchlan |
|
MacLachlan |
| Lacy |
IVL - Wexford |
|
| Lacy |
Normans |
|
| Lally |
|
O'Mullally |
| Lambie |
|
Lamont |
| Lambie |
IVL - Angus |
|
| Lamondson |
|
Lamont |
| Lamont, Lammon |
Gaels |
|
| Lanigan, Lenigan |
|
O'Flanagan (Offely) |
|
