| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Sipho | - | Southern African, Xhosa | ||
| Siran | - | Armenian | ||
| Siranush | - | Armenian | ||
| Siri | SEE-ree (Swedish) | Swedish, Norwegian, Danish | ||
| Siriporn | - | Thai | ||
| Sirius | SIR-ee-əs (English), SEER-ee-əs (English) | Astronomy | ||
| Sirvard | - | Armenian | ||
| Sirvart | - | Armenian | ||
| Sissinnguaq | - | Native American, Greenlandic | ||
| Sisto | - | Italian | ||
| Sita | - | Hinduism, Indian, Hindi, Nepali | ||
| Sithembile | - | Southern African, Zulu | ||
| Siti | - | Malay, Indonesian | ||
| Si-U | shee-oo | Korean | ||
| Siv | SEEV | Swedish, Norwegian, Danish, Norse Mythology |