Matthias, Maithias, Mannix, Mathghamhain, Meallan, Melvin, Malvin, Melvyn, Melwynn, Merril, Meryl, Merritt, Monahan, Morgan, Morven, Morvin, Murchadh, Murrough, Murphey, Murchach, Murray, Murry, Naomhan, Nevan, Neal, Neil, Nevin, Niece, Nolan, Oisin, Ossian, Oscar, Owain, Owen, Eoin, Ewen, Owney, Paddy, Padraig, Patraic, Peadar, Peter, Peadair, Piaras, Phelan, Piran, Proinnsias, Quigley, Quinlan, Quinn, Raegan, Rafer, Raghnall, Reginald, Reynald, Reynold, Randal, Randall, Réamonn, Renny, Raighne, Revelin, Rian, Ryan, Ryanne, Rhyan, Riddock, Riocárd, Riordan, Roarke, Rodhlann, Rowland, Rogan, Ruadhagan, Rowe, Rowen, Rowyn, Rowin, Rowan, Roibeárd, Robert, Roibart, Roibhilín (fonet. Rovelin) Roibin, Roibeard, Ravelin, Ravelyn, Revelin, Ronat, Rooney, Ruanaidh, Rhodan, Rory, Ruarc, Scanlon (fonet. Skanlun), Scully, Séafra (fonet. Szifra), Seán, Seanán, Shannon, Senan, Sinon, Searbhreathach, Sedric, Seoirse, Seosamh, Shanahan, Shea, Sheehan, Siodhacha, Sheridan, Sierra, Sioda, Skelly, Sleibhin, Sloan, Somhairle, Sumerled, Summerled, Sommerly, Strahan, Sullivan, Sweeney, Tadhg, Teagan, Teague, Teagan, Tiernan, Tigernan, Torin, Tormey, Torrance, Treasach, Troy, Uaine, Owen, Owein, Oney, Owney, Hewney, Úistean, Vaughn, Wynne, Winn, Wynn.