S
| Sam |
| Sami |
| Samir |
| Samuel |
| Santino |
| Saran |
| Sarid |
| Saul |
| Savio |
| Scott |
| Se |
| Seaghan |
| Seamus |
| Sean |
| Seanach |
| Seancasey |
| Seanie |
| Sean-james |
| Sean-og |
| Sean-patrick |
| Sean-paul |
| Seb |
| Sebastian |
| Sebastien |
| Seeley |
| Seiji |
| Seimi |
| Senan |
| Seoirse |
| Sepp |
| Sercan |
| Sergiusz |
| Setanta |
| Seth |
| Sevie |
| Shan |
| Shane |
| Shaun |
| Shauney |
| Shawn |
| Shay |
| Shayne |
| Shea |
| Shea-pearse |
| Sheldin |
| Shelton |
| Siddharth |
| Sidney |
| Silas |
| Simas |
| Simon |
| Simonjay |
| Sivan |
| Skyler |
| Smayan |
| Sofien |
| Sol |
| Somhairle |
| Sonni |
| Sonny |
| Sorin |
| Soteras |
| Souhardya |
| Spencer |
| Srivas |
| Stanislaw |
| Stanley |
| Stefan |
| Stephan |
| Stephen |
| Stephen-og |
| Steven |
| Stevie |
| Stevie-james |
| Stewart |
| Stiofan |
| Storm |
| Struan |
| Stuart |
| Sven |
| Syd |
| Syed |
| Sylwester |
| Sze |
| Szymon |