| Signum | insignia |
| Signal | signal |
| Sigill | sigil |
| Sigillum | sigil |
| Sigrid | Sigrid |
| Sigma | sigma |
| Signatur | signature signatory |
| Ignaz | Ignatius |
| Mignon | minion cutie |
| Eigner | owner |
| Eignung | aptitude suitability |
| Lignin | lignin |
| eignen | suit |
| Segnung | blessing |
| Gnu | gnu wildebeest |
| Planum | formation level line plane planum |
| Plenum | plenum |
| Sternum | breastbone sternum |
| Supinum | supine |
| ISIG | ISIS |