article: Dual monarchy
links: Kassite Crown of Castile England Spain Napoleon Bonaparte Portugal Poland-Lithuania Kalmar Union William III of England Zanzibar Polish-Lithuanian Commonwealth Denmark Glorious Revolution Ferdinand II of Aragon Rio de Janeiro Great Britain Crown of Aragon Harthacanute Nippur Babylon Norway Kingdom of England Kingdom of Scotland Kingdom of Great Britain Brazil Isabella of Castile Kingdom of Ireland Kingdom of Spain Mary II of England Iberian Union Denmark-Norway Ancient Egypt Lisbon Netherlands Irish Free State Oman Kush Austria-Hungary Sweyn I of Denmark Sweden Nueva Planta decrees Christopher Columbus James II of England United Kingdom Union of Sweden and Norway Partitions of Poland Personal union Polish-Lithuanian Union