Here is a list of principalities and regions written in the Latin language and English and other names on the right. This is NOT a duplication of Roman provincial names.
| Latin | English name(s) [other name(s)] or [older name(s)] of subdivisions | |
|---|---|---|
| Alandia | Åland | |
| Alberta | Alberta (prov.) | |
| Amazon (state) | Amazonas, most pref. Amazon | |
| Angermannia | Ångermanland, Sweden | |
| Apulia | Apulia (Puglia) | |
| Arcadia | Arcadia (pref.), Greece | |
| Argolis | Argolis, Argolida (pref.), Greece | |
| Australia Australis | South Australia | |
| Australia Occidentalis | Western Australia (state) | |
| Badenia-Virtembergia | Baden-Württemberg (reg.), Germany | |
| Bahusia | Bohuslän, Sweden | |
| Blechingia | Blekinge, Sweden | |
| Boeotia | Boeotia (pref.), Greece | |
| Bohemia | Bohemia (Čechy/Böhmen) (reg.), Czech Republic | |
| Borussia, Prussia | Prussia | |
| Calabria | Calabria, Italy | |
| California Superior | Alta California, now California (state) | |
| California | California (state) United States, (2 states) Mexico | |
| Campania | Campania (reg.) | |
| Cansa, Cansae, Cansas | Kansas (state), United States (America) | |
| Carinthia | Carinthia (reg.), Austria | |
| Carolina Australis | South Carolina (state), United States | |
| Carolina Borealis | North Carolina (state), United States | |
| Cassubia | ||
| Caucasia | Caucasus (reg.), Russia, Armenia, Azerbaijan and Georgia | |
| Chodovia | Chod region (Chodsko/Chodenland) (reg.), Czech Republic | |
| Ciscaucasia | Ciscaucasia (reg.), Russia | |
| Cisjordania | West Bank (reg.), Palestine | |
| Columbia Britannica | British Columbia (prov.) | |
| Corinthia | Corinthia (pref.), Greece | |
| Creta | Crete (prphy.) | |
| Cuiavia | Kuyavia (reg.), Poland | |
| Dacota Australis | South Dakota (state), United States | |
| Dacota Borealis | North Dakota (state), United States | |
| Dalecarlia | Dalarna, Sweden | |
| Dalia | Dalsland, Sweden | |
| Dalmatia | Dalmatia (reg.), Croatia | |
| Demetae (fmr. kdom. and prin.) | Dyfed cty. | |
| Elea, Elia? | Ilia, Elia (pref, fmr. dept.), Greece | |
| Epirus Borealis | Southern Albania, (Northern Epirus) | |
| Epirus | Epirus (prphy.) | |
| Estonia | Estonia | |
| Euboea | Euboea (pref.), (isl.), Greece | |
| Eurytania | Eurytania, Evrytania (pref.), Greece | |
| Finlandia | Finland | |
| Finlandia Australis-Occidentalis | Southwest Finland (South Finland/Egentliga Finland/Varsinais-Suomi), Finland | |
| Finlandia Borealis | Satakunda (North Finland/Satakunta), Finland | |
| Fionia | Funen, Denmark | |
| Flumen Januarii (state) | Rio de Janeiro (state) some RJ metro | |
| Forum Iulii et Venetia Iulia | Friuli-Venezia Giulia | |
| Forum Iulii | Friuli | |
| Galicia | Galicia (reg.), Ukraine and Poland | |
| Georgia (state) | Georgia | |
| Gestricia | Gästrikland, Sweden | |
| Gothia | Götaland, Sweden also Gothenburg | |
| Gotlandia | Gotland, Sweden | |
| Graecia Centralis | Central Greece (prphy.) | |
| Hallandia | Halland, Sweden | |
| Hanakia, Hana, Hanna | Hanakia (reg.), Czech Republic | |
| Helsingia | Hälsingland, Sweden | |
| Herdalia | Härjedalen, Sweden | |
| Hungaria Superior | Upper Hungary (Felvidék) (reg.), Slovakia and Ukraine | |
| Ingria | Ingria (Ingermanland/Inkeri), Estonia and Russia | |
| Ionia (dist.) | Ionia (Western Turkey) | |
| Istria | Istria (reg.), Croatia | |
| Jemtia | Jämtland, Sweden | |
| Jutlandia | Jutland, Denmark | |
| Karelia | Karelia (Karelen/Karjala), Finland and Russia | |
| Lachia | Lachia (reg.), Czech Republic | |
| Lacinia Gazetica | Gaza Strip (reg.), Palestine | |
| Laconia, Lacedaemonia | Laconia (pref.), Greece | |
| Lalandia | Lolland, Denmark | |
| Langobardia | Lombardy (Lombardia), Italy (reg.) | |
| Laponia | Lapland, Finland and Sweden | |
| Lasithia | Lasithia (pref.), Greece | |
| Latium (reg.) | Lazio (reg.) | |
| Liguria | Liguria | |
| Livonia | Livonia (Livland), Latvia and Estonia | |
| Lucania | Basilicata, some prefer Lucania | |
| Lusatia Inferior | Lower Lusatia | |
| Lusatia Superior | Upper Lusatia | |
| Macedonia | Macedonia | |
| Magnesia | Magnesia Prefecture, Greece | |
| Marchiæ | Marche (reg.), Italy | |
| Masovia, Mazovia | Masovia (Mazowsze), prov. of Poland | |
| Medelpadia | Medelpad, Sweden | |
| Michigania | Michigan (state), United States | |
| Moravia | Moravia, (Morava) (reg.), Czech Republic | |
| Moravia Slovaca | Moravian Slovakia, (Slovácko) (reg.), Czech Republic | |
| Nericia | Närke, Sweden | |
| Nigeria | Nigeria | |
| Nova Belgica | New Netherland | |
| Nova Caesarea | New Jersey (state) | |
| Nova Cambria Australis | New South Wales | |
| Nova Hantonia | New Hampshire (state) | |
| Nova Scotia | Nova Scotia (prov.) | |
| Nova Terra et Labrador | Newfoundland and Labrador (prov.) | |
| Nova Terra | formerly Newfoundland (prov.) | |
| Nova Zelandia | New Zealand | |
| Nova Brunsvicum | New Brunswick (prov.), Canada | |
| Nova Eboracum | New York (state) | |
| Nylandia | Nyland (Uusimaa), Finland | |
| Oelandia | Öland, Sweden | |
| Ostrobothnia | Österbotten (Pohjanmaa), Finland | |
| Ostrogothia | Östergötland, Sweden | |
| Patagonia | Patagonia, Argentina, Chile | |
| Pedemontium | Piedmont, Italy | |
| Pella | Pella Prefecture, Greece | |
| Peloponnesus (pen.) | Peloponnesus, Peloponnese (prphy.) / (pen.) | |
| Pennsylvania | Pennsylvania (state) | |
| Phocis | Phocis (Phokida, Phokis) (pref.), Greece | |
| Phthotis | Phthotis, Phthotida (pref.), Greece | |
| Pieria | Pieria, Greece | |
| Podlachia | Podlaskie (reg.), Poland and Belarus | |
| Podolia | Podolia (reg.), Ukraine | |
| Polonia Maior | Greater Poland (Wielkopolska), prov. of Poland | |
| Polonia Minor | Lesser Poland (Małopolska), prov. of Poland | |
| Pomerania Inferior | Hither Pomerania (Vorpommern), reg. of Germany | |
| Pomerania Superior | Farther Pomerania (Pomorze Zaodrzańskie), reg. of Poland | |
| Pomerania | Pomerania (Pomorze/Pommern) (reg.), Poland and Germany | |
| Principis Eduardi, Insula | Prince Edward Island | |
| Prussia, Borussia | Prussia | |
| Respublica Africa Centralis | Central African Republic | |
| Rhodope | Rhodope (p.), Greece | |
| Ruthenia Alba | White Ruthenia (reg.), Belarus | |
| Ruthenia Nigra | Black Ruthenia (reg.), Belarus | |
| Ruthenia Rubra | Red Ruthenia (reg.), Ukraine and Poland | |
| Ruthenia Subcarpathanea | Subcarpathian Ruthenia (reg.), Ukraine | |
| Salisburgium | Salzburg (reg.), Austria | |
| Sambia | Sambia (Baltic) pen., Russia | |
| Samogitia | Samogitia (Žemaitija) (reg.), Lithuania | |
| Sanctus Paulus | São Paulo (state) some SP metro | |
| Savonia | Savonia (Savolaks/Savolax/Savo), Finland | |
| Saxonia-Anhaltinum | Saxony-Anhalt (reg.), Germany | |
| Scania | Skåne, Sweden | |
| Zelandia | Zealand, Denmark | |
| Sicilia | Sicily | |
| Silesia Inferior | Lower Silesia (Dolny Śląsk), prov. of Poland | |
| Silesia Superior | Upper Silesia (Górny Śląsk), prov. of Poland | |
| Silesia | Silesia (Śląsk/Slezsko) reg., Poland and Czech Republic | |
| Smalandia | Småland, Sweden | |
| Styria | Styria (reg.), Austria | |
| Sudermannia | Södermanland, Sweden | |
| Sudetia | Sudetenland (Sudety/pohraniční území) (reg.), Czech Republic | |
| Suecia | Sweden | |
| Tasmania | Tasmania, Australia | |
| Tavastia | Tavastia (Tavastland, Häme), Finland | |
| Terra Nova et Labrador | Newfoundland and Labrador | |
| Terra Scania | Terra Scania (Skåneland), Sweden | |
| Territoria Borealis | Northern Territory | |
| Territoria Borealis-Occidentalis | Northwest Territories, Northwest Territory | |
| Thesprotia | Thesprotia (pref.), Greece | |
| Thessalia | Thessaly (prphy.) | |
| Thracia | Thrace (prphy.), Southern Bulgaria, Western Turkey | |
| Transcarpathia | Transcarpathia (reg.), Ukraine | |
| Transcaucasia | Transcaucasia (reg.), Armenia, Azerbaijan and Georgia | |
| Transnistria | Transnistria (reg.), Moldova | |
| Tridentinum et Tirolum Meridionale | Trentino-Alto Adige/Südtirol | |
| Tuscia | Tuscany | |
| Tzechia | Bohemia (Čechy) | |
| Ucraina Transcarpathanea | Transcarpathian Ukraine (reg.), Ukraine | |
| Umbria | Umbria (reg.) | |
| Uplandia | Uppland, Sweden | |
| Valachia | Wallachia (reg.), Romania | |
| Valachia Moravica | Moravian Wallachia (reg.), Czech Republic | |
| Vallis Augustana | Val d'Aosta | |
| Vasingtonia (state) | Washington (state) | |
| Victoria (Regna) | Victoria (state) | |
| Volhynia | Volhynia (reg.), Ukraine | |
| Wermelandia | Värmland, Sweden | |
| Westmannia | Västmanland, Sweden | |
| Westrobothnia | Västerbotten, Sweden | |
| Westrogothia | Västergötland, Sweden |
Latinized form of a Greek derived name