| Sigi | | - | German | |
| Sigibert | | - | Ancient Germanic | |
| Sigifrid | | - | Ancient Germanic | |
| Sigihard | | - | Ancient Germanic | |
| Sigiheri | | - | Ancient Germanic | |
| Sigihild | | - | Ancient Germanic | |
| Sigilind | | - | Ancient Germanic | |
| Sigimund | | - | Ancient Germanic | |
| Sigismund | | - | German, Ancient Germanic | |
| Sigivald | | - | Ancient Germanic | |
| Sigiward | | - | Ancient Germanic | |
| 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 | |