| Families |
Ethnic Group |
Branch of |
| Rice |
IVL - Louth |
|
| Rice |
Normans |
|
| Risk |
|
Buchanan |
| Ritchie |
|
MacKintosh |
| Ritchie |
|
MacPherson |
| Ritchie |
IVL - South Scotland |
|
| Robertson |
Gaels |
|
| Robison, Robson |
|
Gunn |
| Roche |
IVL - Ireland |
|
| Roche |
Normans |
|
| Ronaldson, Ronald |
|
MacDonald |
| Rorison |
|
MacDonald |
| Rose |
|
O'Cahan |
| Rose |
IVL - Limerick |
|
| Ross |
Gaels |
|
| Ross |
IVL - South Scotland |
|
| Rothe, Ruth |
Normans |
|
| Ruskin |
|
Buchanan |
| Ruthven |
Vikings |
|
| Ryan |
|
O'Mulryan |
| Ryan |
IVL - Leinster, Roscommon |
|
| Sage |
|
Savage |
| Sanderson |
|
MacDonald (Glengarry) |
| Sarsfield |
Normans |
|
| Savage |
Normans |
|
| Savage |
IVL - South Scotland |
|
| Savage |
IVL - Cork, Kerry |
|
| Scrymgeour |
|
MacDuff |
| Shane |
|
O'Farrell |
| Shaw |
|
MacKintosh |
| Shearhoon |
|
Prendergast |
| Shields, Sheilds |
|
O'Shiel |
| Shinnock, Shinnach |
Gaels |
Fox |
| Shinnock, Shinnach |
IVL - Sligo, Cork |
|
| Shoye |
|
Joyce |
| Simpson |
|
Fraser |
| Sinclair |
Normans |
|
| Sinclair |
IVL - Argyle, Perthshire |
|
| Skene |
|
|
| Skerret |
|
Tribes of Galway |
| Spalding |
Normans |
|
| Spens, Spence |
|
MacDuff |
| Spittal |
|
Buchanan |
| Steuart, Stuart |
|
Stewart |
| Stewart |
Normans |
|
| Stirling |
Normans |
|
| Strathearn |
Cruithne |
|
| Sutherland |
Normans |
|
| Swanson |
|
Gunn |
| Taaffe |
Normans |
|
| Taggart |
IVL - Ulster |
|
|
