| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| SIVA | - | Tamil, Indian, Telugu, Kannada, Malayalam | ||
| SIVE | SIEV | Irish | ||
| SIWAN | - | Welsh | ||
| SIWARD | - | Ancient Germanic | ||
| SI-WOO | shee-oo | Korean | ||
| SIXTE | - | French | ||
| SIXTEN | - | Swedish | ||
| SIXTINE | - | French | ||
| SIXTUS | - | Late Roman | ||
| SIZWE | - | Southern African, Xhosa | ||
| SJAAK | SHAH:K | Dutch | ||
| SJAKIE | SHAH-kee | Dutch | ||
| SJANG | SHAHNG | Limburgish | ||
| SJAREL | SHAH-rəl | Limburgish | ||
| SJEF | SHEF | Dutch |