| Siman | - | Czechoslovakian Name | Simão | - | Portuguese Name |
| Simba | - | African Name | Simcha | - | Yiddish Name |
| Simeon | - | Biblical Name | Simeono | - | Philippines Name |
| Simkha | - | Yiddish Name | Simon | - | Hebrew Name |
| Simon Bolivar | - | Bolivia Name | Simoun | - | Philippines Name |
| Simu | - | Romanian Name | Sin | - | Biblical Name |
| Sinai | - | Biblical Name | Sinan | - | Muslim Name |
| Sincere | - | American Name | Sinclair | - | Scottish Name |
| Sindhu | - | Hindu Name | Sindre | - | Norse Name |
| Sindri | - | Norse Name | Singaravelan | - | Indian Name |
| Sinh | - | Vietnamese Name | Sinha | - | Hindu Name |
| Sinhag | - | Hindu Name | Sinhvahan | - | Hindu Name |
| Siniša | - | Serbian Name | Siniša-Mihailo | - | Serbian Name |
| Sinjon | - | French Name | Sinon | - | Biblical Name |
| Sion | - | Armenian Name | Sipatu | - | American Name |
| Sippai | - | Biblical Name | Siracettin | - | Turkish Name |
| Siraj | - | Indian Name | Siraj | - | Hindu Name |
| Sirdan | - | Cyprien Name | Sisamai | - | Biblical Name |
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