Nationality API results include predictions listed in the property spheres, referring to onospheres, from the Greek ono (name) and the English sphere (area).

Onospheres are collections of jurisdictions that share a predominate naming custom, e.g. British, Arabic or French.

The ares are comprised as follows:

Anglonosphere – Region where names predominantly come from a British tradition

• Anguilla
• Antigua and Barbuda
• Australia
• Bahamas
• Barbados
• Bermuda
• British Virgin Islands
• Canada
• Cayman Islands
• Dominica
• England
• Falkland Islands
• Grenada
• Ireland
• Isle of Man
• Jamaica
• Jersey
• Liberia
• Marshall Islands
• Micronesia
• Montserrat
• New Zealand
• Norfolk Island
• Northern Ireland
• Papua New Guinea
• Pitcairn Islands
• Saint Helena Ascension and Tristan Da Cunha
• Saint Kitts and Nevis
• Saint Lucia
• Saint Vincent and The Grenadines
• Scotland
• Turks and Caicos Islands
• United States
• United States Virgin Islands
• Vanuatu
• Wales

Hisponosphere – Region where names predominantly come from a Spanish tradition

• Andorra
• Argentina
• Bolivia
• Chile
• Colombia
• Costa Rica
• Cuba
• Dominican Republic
• Ecuador
• El Salvador
• Guatemala
• Honduras
• Mexico
• Nicaragua
• Panama
• Paraguay
• Peru
• Philippines
• Puerto Rico
• Spain
• Uruguay
• Venezuela

Sinonosphere – Region where names predominantly come from a Chinese tradition

• China
• Hong Kong
• Macau
• Singapore
• Taiwan

Arabonosphere – Region where names predominantly come from a Arab tradition

• Bahrain
• Brunei
• Comoros
• Djibouti
• Egypt
• Eritrea
• Iraq
• Jordan
• Kuwait
• Lebanon
• Libya
• Maldives
• Oman
• Palestine
• Qatar
• Saudi Arabia
• Somalia
• Sudan
• Syria
• Tunisia
• United Arab Emirates
• Yemen

Lusonosphere – Region where names predominantly come from a Portugese tradition

• Angola
• Brazil
• Cape Verde
• East Timor
• Guinea Bissau
• Portugal
• Sao Tome and Principe

Germanonosphere – Region where names predominantly come from a German tradition

• Austria
• Germany
• Liechtenstein
• Switzerland

Turkonosphere – Region where names predominantly come from a Turkish tradition

• Northern Cyprus
• Turkey

Franconosphere – Region where names predominantly come from a French tradition

• France
• Haiti
• New Caledonia
• Saint Barthelemy
• Saint Martin
• Saint Pierre and Miquelon
• Seychelles

Italonosphere – Region where names predominantly come from an Italian tradition

• Italy
• San Marino

Serbo-Croatonosphere – Region where names predominantly come from a Serbian, Croat, Bosniak or Montenegrin tradition

• Bosnia and Herzegovina
• Croatia
• Montenegro
• Serbia

Greconosphere – Region where names predominantly come from a Greek tradition

• Cyprus
• Greece

Danonosphere – Region where names predominantly come from a Danish tradition

• Denmark
• Greenland
• Faroe Islands

Shqiponosphere – Region where names predominantly come from an Albanian tradition

• Albania
• Kosovo

Georgia (de jure) – Georgia considered with its breakaway regions

• Abkhazia
• Georgia
• South Ossetia