Achternamen
| Achternaam | Aantal |
|---|---|
| Switters | 1 |
| Switzar | 1 |
| Swoboda | 1 |
| Swol, van | 2 |
| Swolfs | 2 |
| Swtizar | 1 |
| Swüste | 2 |
| Sy | 1 |
| Syben | 3 |
| Sybers | 4 |
| Sykora | 1 |
| Symaes | 1 |
| Symens | 1 |
| Symeonidou | 1 |
| Symes | 2 |
| Symkens | 2 |
| Symons | 5 |
| Symynck | 1 |
| Sype, van de | 1 |
| Sypt, vander | 1 |
| Syrier | 2 |
| Syroit | 1 |
| Sys | 1 |
| Systermans | 15 |
| Syzdol | 1 |