Dual naming is a policy for the naming of geographical landmarks, in which an official name is adopted that combines two previous names. Usually, the context is a conflict over which of the two previous names is most appropriate.

In several countries, dual naming is used where a native people and a colonial settler community have previously used two names.

In Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

, a dual naming policy is used to name landmarks that are of significance to the Indigenous Australians

Indigenous Australians

Indigenous Australians are the original inhabitants of the Australian continent and nearby islands. The Aboriginal Indigenous Australians migrated from the Indian continent around 75,000 to 100,000 years ago....

, but for which the most common name is European. For example, the landmark with the indigenous name Uluru

Uluru

Uluru , also known as Ayers Rock, is a large sandstone rock formation in the southern part of the Northern Territory, central Australia. It lies south west of the nearest large town, Alice Springs; by road. Kata Tjuta and Uluru are the two major features of the Uluṟu-Kata Tjuṯa National Park....

and European name Ayers Rock is now officially named Uluru / Ayers Rock.

Similarly, in New Zealand

New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

, many places have dual Maori

Maori language

Māori or te reo Māori , commonly te reo , is the language of the indigenous population of New Zealand, the Māori. It has the status of an official language in New Zealand...

 and English

English language

English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...

 names, such as Aoraki/Mount Cook

Aoraki/Mount Cook

Aoraki / Mount Cook is the highest mountain in New Zealand, reaching .It lies in the Southern Alps, the mountain range which runs the length of the South Island. A popular tourist destination, it is also a favourite challenge for mountain climbers...

. The practice of officially giving certain New Zealand places dual names began in the 1920s, but dual names have become much more common in the 1990s and 2000s, in part due to treaty settlements

Treaty of Waitangi claims and settlements

Treaty of Waitangi claims and settlements have been a significant feature of New Zealand race relations and politics since 1975. Over the last 30 years, New Zealand governments have increasingly provided formal legal and political opportunity for Māori to seek redress for breaches by the Crown of...

.

"Derry/Londonderry" has been used unofficially to circumvent the Derry/Londonderry name dispute, in which Irish nationalists

Irish nationalism

Irish nationalism manifests itself in political and social movements and in sentiment inspired by a love for Irish culture, language and history, and as a sense of pride in Ireland and in the Irish people...

 used "Derry" and Ulster unionists use "Londonderry" for the city

Derry

Derry or Londonderry is the second-biggest city in Northern Ireland and the fourth-biggest city on the island of Ireland. The name Derry is an anglicisation of the Irish name Doire or Doire Cholmcille meaning "oak-wood of Colmcille"...

 and county

County Londonderry

The place name Derry is an anglicisation of the old Irish Daire meaning oak-grove or oak-wood. As with the city, its name is subject to the Derry/Londonderry name dispute, with the form Derry preferred by nationalists and Londonderry preferred by unionists...

 in Northern Ireland

Northern Ireland

Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...

. The "Derry stroke Londonderry" spoken form of this has in turn engendered the city's nickname "Stroke City".

Dual naming has been common on road signs in Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

 since the 1970s. Welsh towns and cities have long been bilingual on signs in Wales- Cardiff

Cardiff

Cardiff is the capital, largest city and most populous county of Wales and the 10th largest city in the United Kingdom. The city is Wales' chief commercial centre, the base for most national cultural and sporting institutions, the Welsh national media, and the seat of the National Assembly for...

/Caerdydd; Swansea

Swansea

Swansea is a coastal city and county in Wales. Swansea is in the historic county boundaries of Glamorgan. Situated on the sandy South West Wales coast, the county area includes the Gower Peninsula and the Lliw uplands...

/Abertawe; Newport/Casnewydd.