O'Mulleeny,                 Mayo     O'Quinn, Lord,        Londonderry
    O'Mullen, Chief,     Londonderry     O'Quinn, Chief,            Tyrone
    O'Mulligan,                Cavan     O'Quinn, Lord,           Longford
    O'Mulligan,          Londonderry     O'Quinn, Lord,           Limerick    
    O'Mullins,                 Clare     O'Quinn, Lord,              Clare 
    O'Molloy,              Roscommon     O'Quinn,                     Mayo 
    O'Mulmoghery,            Donegal     O'Rafferty,               Donegal 
    O'Mulrenin,                 Mayo     O'Rafferty,                Tyrone 
    O'Mulrenin, Chief,     Roscommon     O'Regan, Chief,        Queen's Co 
    O'Mulrooney,              Galway     O'Regan, Prince,            Meath 
    O'Mulrooney,           Fermanagh     O'Regan,                     Cork 
    O'Mulroy,                   Mayo     O'Reilly, Prince,           Cavan 
    O'Mulvany,                 Sligo     O'Reilly, Chief,            Meath 
    O'Mulvany,             King's Co     O'Reilly,              West Meath 
    O'Mulvany,               Donegal     O'Reilly                 Longford 
    O'Mulvey, Chief,         Leitrim     O'Riordan, Chief,            Cork 
    O'Mulvihil,            Roscommon     O'Rodaghan, Chief,        Leitrim 
    O'Muready, Chief,      King's Co     O'Roddan,                    Mayo 
    O'Murphy, Lord,          Wexford     O'Roddy,                  Donegal 
    O'Murphy,                   Cork     O'Rody,                      "
    O'Murray, Lord,             Mayo     O'Rogan,                     Down 
    O'Murray,                  Cavan     O'Ronan,                 Longford 
    O'Murray,                Donegal     O'Ronan,                     Mayo 
    O'Murray, Chief,     Londonderry     O'Ronayne,                   Cork 
    O'Murrigan, Prince,      Kildare     O'Rooney,                    Down 
    O'Mutagh,                  Meath     O'Rory, Prince,             Meath 
    O'Naghten (or Norton),               O'Rothlan,                   Mayo 
              Chief,          Galway     O'Rourke, Prince,         Leitrim 
    O'Neil (or Nihel),         Clare     O'Ryan, Lord,              Carlow 
    O'Neil, Prince,          Donegal     O'Ryan,                  Kilkenny 
    O'Neil, Lord,             Antrim     O'Ryan,                  Limerick 
    O'Neil, Lord,               Down     O'Ryan, Lord,           Tipperary 
    O'Neil, Lord,             Armagh     O'Scanlan, Chief,           Louth 
    O'Neil, King, Prince,                O'Scanlan,                  Kerry
            Earl,             Tyrone     O'Scanlan, Chief,        Limerick
    O'Neney, Chief,              "       O'Scannell,                  Cork 
    O'Neny,                 Monaghan     O'Scullan,            Londonderry 
    O'Neylan, Chief,          Armagh     O'Scully, Baron,            Meath 
    O'Neylan                   Clare     O'Scully,               Tipperary 
    O'Nolan, Lord,            Carlow     O'Scurry,                  Galway  
    O'Noonan, Chief,            Cork     O'Sexton,               Tipperary 
    O'Norton, Chief,       Roscommon     O'Shanahan,                 "
    O'Quigly,            Londonderry     O'Shaughnesy, Lord,        Galway 
    O'Quill,                   Kerry     O'Shea,                      Cork 
    O'Quinlan,             Tipperary     O'Shea, Lord,               Kerry 
    O'Quinlan,                 Kerry     O'Shea,                 Tipperary 
    O'Quinlevan,               Clare     O'Shea (or Shee),        Kilkenny 
    O'Quinlevan, Chief,    Tipperary     O'Sheehan,                  Kerry 
    O'Quinn, Chief,          Donegal     O'Sheehan, Chief,        Limerick

    O'Sheehan,                Galway     Prendergast, De,          Wexford 
    O'Sheehan,               Donegal     Preston, Viscount,         Dublin 
    O'Sheridan,                Cavan     Purcell,                 Kilkenny 
    O'Sheridan,             Longford     Purcell,                 Limerick
    O'Shiel,                  Antrim     Purcell, Baron,         Tipperary 
    O'Shiel, Chief,       West Meath     Quigley (see O'Coigley)              
    O'Sionagh,                 "         Redmond,                  Wexford
    O'Slattery,                Kerry     Renzy, De,                   "    
    O'Slattery,            Tipperary     Riddell,                     Down
    O'Slevin,               Longford     Roche, Viscount,             Cork 
    O'Spillan,             Tipperary     Roche,                   Limerick
    O'Spillane,                Sligo     Rossiter,                 Wexford 
    O'Sullivan,               Galway     Roth,                    Kilkenny 
    O'Sullivan, Lord,      Tipperary     Russell,                     Down 
    O'Sullivan Beare,                    Russell,                 Limerick 
               Prince,          Cork     Sarsfield, Earl,           Dublin 
    O'Sullivan, Prince,          "       Sarsfield,                 Carlow 
    O'Sullivan More, Lord,     Kerry     Sarsfield,                   Cork 
    O'Talcharan,                Mayo     Sarsfield, Viscount,     Limerick 
    O'Tarcert, Chief,        Donegal     Savadge, Lord,               Down 
    O'Teige (or Tighe),      Wicklow     Seagrave,                  Dublin 
    O'Teigue,                 Tyrone     Sinnott,                  Wexford 
    O'Tierney,                Armagh     Sherlock,               Waterford 
    O'Tierney, Lord,            Mayo     Shortall,                Kilkenny 
    O'Tolarg, Lord,       West Meath     Skerret,                   Galway 
    O'Tomalty,                Tyrone     Skiddy,                      Cork 
    O'Toole, Lord,           Kildare     Smerwick,                   Kerry 
    O'Toole, Prince,         Wicklow     Smyth,                       Down 
    O'Toole,                  Galway     Stack,                      Kerry 
    O'Toole,                    Mayo     Stafford,                 Wexford 
    O'Tormey,                 Galway     Staunton,                    Down 
    O'Tracey,                    "       Staunton,                  Galway 
    O'Tracy,               Fermanagh     Staunton,                    Mayo 
    O'Traynor,                 Meath     Strongbow,                 Carlow 
    O'Tully,               Fermanagh     Strongbow, Earl,          Wexford 
    O'Tuohy,                    Cork     Supple,                      Cork 
    O'Tuomey,                    "       Sutton,                   Wexford 
    Peppard,                   Louth     Synott,                      Mayo 
    Petit, Baron,         West Meath     Taafe, Earl,                Louth 
    Petit,                      Mayo     Taafe, Baron,                Mayo 
    Phepoe,                    Meath     Taafe, Baron,              Dublin 
    Plunket, Baron,            Louth     Talbot,                   Wicklow
    Plunkett,                  Cavan     Talbot, Earl,             Wexford 
    Plunkett, Earl,            Meath     Talbot,                 Waterford 
    Plunkett,                 Dublin     Tallon,                    Carlow 
    Poer, Le,                   Down     Taylor,                    Dublin 
    Poer, Le, Lord,        Waterford     Trant,                      Kerry 
    Poer, Le (or Power),       "         Troy,                    Limerick 
    Power,                  Kilkenny     Tuite, Baron,          West Meath
    Prendergast,                Mayo     Tuite,                   Longford 



    Tyrrell,              West Meath     Walsh,                   Kilkenny
    Tyrrell, Baron,           Dublin     Walsh,                  Waterford
    Verdon, De,                Louth     Walsh,                       Cork
    Verdon, De,           West Meath     Walsh,                      Kerry
    Vesey, De, Lord,         Kildare     Walsh,                  Tipperary
    Vesey, De, Lord,      Queen's Co     Warren,                 King's Co
    Wadding,               Waterford     White,                       Down
    Wadding,                 Wexford     White,                  Waterford
    Wall,                     Carlow     White,                   Limerick
    Wall,                  Waterford     White,                  Tipperary
    Walsh,                    Dublin     Wogan,                    Kildare
    Walsh,                   Wicklow     Woulfe,                  Limerick
    Walsh,                   Wexford     Wyse,                   Waterford

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