- Sweetland
- Sweetman
- Sweetser
- Sweetster
- Sweetzer
- Swenson
- Swett
- Swetz
- Swiatocha
- Swift
- Swindler
- Swingle
- Swope
- Sword
- Swoverland
- Swynnerton
- Syer
- Sykes
- Syler
- Sylvester
- Symonds
- Symons
- Syngewood
- Szarowicz
- Szymczak
- Szymkiewicz
- Taber
- Tabor
- Tafoya
- Taft
- Taglieri
- Tail
- Taillefer
- Tait
- Talbot
- Talbott
- Talcott
- Talley
- Tallman
- Talmadge
- Talvas
- Tanfield
- Tanner
- Tapley
- Tapp
- Tappan
- Tappe
- Tappen
- Tapping
- Tarbell
- Tarbox
- Tardiff
- Tarr
- Tate
- Tatman
- Taugher
- Taussig
- Tawes
- Tayler
- Taylor