| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Sif | SEEF (Norse Mythology) | Norse Mythology, Danish, Icelandic | ||
| Sigdag | - | Ancient Germanic | ||
| Sigeberht | - | Anglo-Saxon | ||
| Sigeweard | - | Anglo-Saxon | ||
| SigfrØ&Eth;R | - | Ancient Scandinavian | ||
| Sigfrid (2) | - | Norwegian | ||
| Sigfrido | seeg-FREE-do (Italian), seeg-FREE-dho (Spanish) | Italian, Spanish | ||
| Sigi | - | German | ||
| Sigibert | - | Ancient Germanic | ||
| Sigifrid | - | Ancient Germanic | ||
| Sigihard | - | Ancient Germanic | ||
| Sigiheri | - | Ancient Germanic | ||
| Sigihild | - | Ancient Germanic | ||
| Sigilind | - | Ancient Germanic | ||
| Sigimund | - | Ancient Germanic |