| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| SiÔN | SHON | Welsh | ||
| SiÔR | SHOR | Welsh | ||
| Siana | - | Welsh | ||
| Siani | - | Welsh | ||
| Siarl | SHARL | Welsh | ||
| Siavash | - | Persian, Persian Mythology | ||
| Siavush | - | Persian | ||
| SibÉAl | - | Irish | ||
| Sibonakaliso | - | Southern African, Zulu | ||
| Sibyl | SIB-əl | English | ||
| Sibylla | zi-BUY-lah (German) | Greek, German, Swedish, Late Roman, Late Greek | ||
| Sid | SID | English | ||
| Siddhartha | - | Sanskrit, Bengali | ||
| Sidika | - | Turkish | ||
| Sidney | SID-nee | English |