- Sabri
- Said
- Salim
- Salmo
- Salvador
- Salvator
- Samad
- Sami
- Samir
- Samson
- Samuel
- Samvel
- Sander
- Sandolf, Sandulf
- Sandor
- Sandro
- Sanjar
- Sanjin
- Santeri
- Santiago
- Santino
- Santtu
- Sarmis
- Šarūnas
- Sasha
- Saul
- Sava
- Sawney
- Sawyl
- Sæbjørn
- Seamus
- Sefer
- Sebastian
- Selim
- Selyf
- Semih
- Sender
- Seppe
- Séraphin, Serafim
- Seth
- Severin, Soren
- Shahin
- Shayno
- Shmuel
- Siam
- Sikander
- Silas
- Silvan
- Silver, Silvère
- Silverius
- Sylvester/Silvester
- Simeon, Simon
- Simidh
- Sinan
- Siveri
- Skaistis
- Skender
- Skirgaila
- Sobiesąd
- Solal
- Solomon
- Solt
- Soma
- Somereld
- Somerled
- Sofus
- Spidols
- Spodris
- Stanimir
- Stephen
- Stojan, Stoyan
- Stipe
- Stavros
- Sture
- Sturla, Sturle
- Sufian
- Sulev, Sulo
- Sulo
- Sumarle
- Sumarliði
- Summaldur
- Svand
- Svante, Svätopluk, Svatopluk, Świętopełk
- Svend
- Svitrigaila
- Swan
- Szabolcs
- Szczesny
