| Latin name | Vernacular name (AACR2 form) | country code |
|---|---|---|
| Iaurini* | Györ (Hungary) | hu |
| Ienae* | Jena (Germany) | gw |
| Ihenae see Ienae |
||
| Ilerdae* | Lérida (Spain) | sp |
| Ingoldstadiensis see Ingolstadii | ||
| Ingolstadii* | Ingolstadt (Germany) | gw |
| Insulae ad lacum Acronium * | Lindau (Bavaria, Germany) | gw |
| Iscae Dumnoniorum * | Exeter (England) | enk |
| Isenaci* | Eisenach (Germany) | gw |
| Islebiae see Islebii | ||
| Islebii* | Eisleben (Germany) | gw |
| Isnae see Isnae in Algauia | ||
| Isnae in Algauia* | Isny im Allgäu (Germany) | gw |
| Iuliae Augustae Dertonae see Dertonae |
||
| Iutreboci* | Jüterbog (Germany) | gw |