| Sigge | | - | Swedish | |
| Sigmund | | ZEEK-muwnt (German), SIG-mənd (English) | German, Swedish, Norwegian, Danish, English | |
| Sigmundr | | - | Ancient Scandinavian | |
| SignÝ | | - | Ancient Scandinavian, Norse Mythology, Icelandic | |
| Signe | | SEENG-ne (Swedish, Norwegian), SEE-ne (Danish) | Swedish, Norwegian, Danish | |
| Signy | | - | Swedish, Norwegian, Danish | |
| SigrÍ&Eth;R | | - | Ancient Scandinavian | |
| SigrÚN | | - | Ancient Scandinavian, Norse Mythology, Icelandic | |
| Sigrid | | SEEG-reed (Finnish) | Norwegian, Swedish, Danish, Estonian, Finnish (Archaic) | |
| Sigrun | | - | Swedish, Norwegian, Danish | |
| Sigsteinn | | - | Ancient Scandinavian | |
| Sigur&Eth;R | | - | Ancient Scandinavian, Norse Mythology | |
| Sigurd | | SEE-gurd (Swedish) | Norwegian, Danish, Swedish, Norse Mythology | |
| Sigvard | | - | Swedish | |
| Siiri | | SEE:-ree (Finnish) | Estonian, Finnish | |