Personal union
A personal union consists of two or more entities that are internationally considered separate states, only sharing the same Head of State (and thence also sharing whatever political actions are vested in the Head of State, but no, or at least extremely few, others). It is not to be confused with a federation (like the USA), which is internationally considered a single state.Personal unions can arise for very different reasons, ranging from near coincedence (a princess who is already married to a king becomes a queen regnant, and their child inherits both countries) to virtual annexation (where a personal union sometimes was seen as a means of preventing uprisals). They can also be codified (the constitutions of the states clearly express that they shall be joined together) or non-codified (in which case they can easily be broken by e.g. different succession rules).
There is a somewhat grey area between personal unions and federations, and the one has regularly grown into the other. This article is an attempt at listing some historical and contemporary personal unions.
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Albania
Andorra
Antigua and Barbuda
Australia
Austria
Bahamas
Barbados
Belize
Canada
Denmark
England
Ethiopia
Finland
France
Great Britain
Grenada
Hanover
Holy Roman Empire
Hungary
Iceland
Ireland
Italy
Jamaica
Lithuania
Luxembourg
New Zealand
Norway
Netherlands
Papua New Guinea
Poland
Poland-Lithuania
Portugal
Russia
Saint Kitts and Nevis
Saint Lucia
Saint Vincent and the Grenadines
Scotland
Spain
Schleswig and Holstein
Duchies with peculiar rules for succession.
Solomon Islands
- The Commonwealth Realms, officially a personal union since 1927, presently with Antigua and Barbuda, Australia, the Bahamas, Barbados, Belize, Canada, Grenada, Jamaica, New Zealand, Papua New Guinea, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Tuvalu and the United Kingdom
Sweden
Main article: Unions of Sweden
- Personal union with Norway from 1319 to 1343
- The Kalmar Union with Denmark and Norway from 1389 to 1521 (sometimes defunct)
- Personal union with Poland-Lithuania from 1592 to 1599
- Personal union with Norway from 1814 to 1905 (sometimes called Sweden-Norway)
Tuvalu
- The Commonwealth Realms, officially a personal union since 1927, presently with Antigua and Barbuda, Australia, the Bahamas, Barbados, Belize, Canada, Grenada, Jamaica, New Zealand, Papua New Guinea, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, the Solomon Islands and the United Kingdom
United Kingdom
- Personal union with Hanover from 1801 to 1837
- Personal union with Ireland from 1922 (broken out) to 1949
- The Commonwealth Realms, officially a personal union since 1927, presently with Antigua and Barbuda, Australia, the Bahamas, Barbados, Belize, Canada, Grenada, Jamaica, New Zealand, Papua New Guinea, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, the Solomon Islands and Tuvalu