- Sirrine
- Siver
- Sjolshagen
- Skean
- Skerl
- Skerrett
- Skidmore
- Skillman
- Skilton
- Skinner
- Skipper
- Skomro
- Skow
- Skye
- Slader
- Slaght
- Slaugh
- Slaughter
- Slauson
- Slavik
- Slawik
- Sleeper
- Sliger
- Sloan
- Sloat
- Sloatman
- Slocum
- Slocumb
- Sloniker
- Sloss
- Sluyter
- Sly
- Small
- Smalley
- Smaltz
- Smart
- Smedley
- Smerdon
- Smigowski
- Smiley
- Smith