- Swartwood
- Swartz
- Swasey
- Sweat
- Sweatt
- Sweeney
- Sweet
- Sweetser
- Sweetster
- Swenson
- Swett
- Swetz
- Swiatocha
- Swift
- Swindler
- Swingle
- Swope
- Sword
- Swoverland
- Sykes
- Syler
- Sylvester
- Szarowicz
- Szymczak
- Szymkiewicz
- Taber
- Tabor
- Tafoya
- Taft
- Taglieri
- Tail
- Tait
- Talbot
- Talbott
- Talley
- Tallman
- Tanner
- Tapley
- Tappe
- Tarbell
- Tarbox
- Tardiff
- Tarr
- Tate
- Tatman
- Tawes
- Taylor
- Teel
- Teeter
- Tefft
- Teillon
- Telfer
- Tellier
- Tellis
- Teltscher
- Temple
- Tennant
- Tennett
- Tenney
- Tennie
- Tennis
- TePly
- Terlecky
- Terpstra
- Terrell
- Terril
- Terry
- Terwilleger
- Teters
- Tetlow
- Tewksbury
- Thacher
- Thacker
- Tharp
- Thatcher
- Thayer
- Thelander
- Theobold
- Theye
- Thiboutot
- Thoma
- Thomas