| Latin name | Vernacular name (AACR2 form) | country code |
|---|---|---|
| Ratisbonae* | Regensburg (Germany) | gw |
| Ratisponae see Ratisbonae | ||
| Rauenspurgi* | Ravensburg (Germany) | gw |
| Reatae* | Rieti (Italy) | it |
| Reate see Reatae |
||
| Regii * see also Regii Calabriae | Reggio Emilia (Italy) | it |
| Regii Calabriae* | Reggio di Calabria (Italy) | it |
| Regio Iulio see Regii Calabriae | ||
| Regiomonti Borussiae * | Königsberg (Germany) =Kaliningrad (Kaliningradskaia oblast', Russia) [both valid AACR2 headings] |
ru |
| Regiomonti Borussorum see Regiomonti Borussiae |
||
| Rhegii Lingobardiae see Regii |
||
| Rhemis see Durocortori | ||
| Rignauiae* | Rheinau (Switzerland) | sz |
| Rintelii* | Rinteln (Germany) | gw |
| Ripae* | Riva (Italy) | it |
| Romae* | Rome (Italy) | it |
| Rostoch. see Rostochii | ||
| Rostochi see Rostochii | ||
| Rostochii* | Rostock (Germany) | gw |
| Roteraedami see Roterodami | ||
| Roterod. see Roterodami | ||
| Roterodami* | Rotterdam (Netherlands) | ne |
| Rothomagi see Rotomagi | ||
| Rotomagi* | Rouen (France) | fr |
| Rotterdami see Roterodami | ||
| Rotterodami see Roterodami | ||
| Rudolstadii* | Rudolstadt (Germany) | gw |
| Rupellae* | La Rochelle (France) | fr |