| Name | # Entries |
|---|---|
| Sharpe | 7 |
| Sneddon | 1 |
| Scalabrini | 0 |
| Scalabrinian | 0 |
| Scale | 4 |
| Scaliery | 0 |
| Scalise | 0 |
| Seabrooke | 0 |
| Seaby | 0 |
| Seach## | 2 |
| Seade | 0 |
| Siventhirakumar | 0 |
| Sivalingam | 2 |
| Sivaloganathan | 0 |
| Sivanathan | 0 |
| Sivapalasundram | 0 |
| Sivaprakasam | 0 |
| Sivaram | 0 |
| Sivaraman | 0 |
| Sivarasa | 0 |
| Sivas | 0 |
| Sivasothy | 0 |
| Sivasubramaniam | 1 |
| Siveyer | 0 |
| Sivathevan | 0 |
| Sivcev | 0 |
| Siveira | 0 |
| Sivies | 0 |
| Sivilay | 0 |
| Siviter | 8 |
| Suminda | 0 |
| Sumitomo | 0 |
| Summakwan | 0 |
| Summarsell | 0 |
| Summer | 10 |
| Summerbell | 0 |
| Summerhayes | 4 |
| Saint Jean | 0 |
| Sainz | 0 |
| Saira | 0 |
| Sais | 1 |
| Saisanid | 0 |
| Saith | 0 |
| Saisal | 0 |
| Saito Abdullahi | 0 |
| Saita | 0 |
| Saiz | 0 |
| Sajac Stojanovic | 0 |
| Sajan | 0 |
| Strainge | 0 |
| Straiton | 2 |
| Straley | 0 |
| Stramare | 0 |
| Strambio | 0 |
| Stranaghan | 0 |
| Snee | 0 |
| Sneed | 0 |
| Snel | 0 |
| Sneeder | 0 |
| Sneler | 0 |
| Snelgar | 21 |
| Scalon | 0 |
| Scalter | 0 |
| Seago | 0 |
| Seaghdha | 0 |
| Seagrim | 0 |
| Seaha | 0 |
| Seaib | 0 |
| Seakins | 0 |
| Swensson | 11 |
| Swettenham | 0 |
| Swiac | 0 |
| Swiadkowski | 0 |
| Swiatkiwsky | 0 |
| Swepston | 0 |