John VI of Portugal

Dom John VI (Portuguese: João VI; – ), nicknamed "the Clement", was King of the United Kingdom of Portugal, Brazil and the Algarves from 1816 to 1822, and, although de facto the United Kingdom over which he ruled ceased to exist, he remained so de jure from 1822 to 1825; after the recognition of Brazilian independence under the 1825 Treaty of Rio de Janeiro, he continued as King of Portugal and the Algarves until his death in 1826. Under the said Treaty he also became Titular Emperor of Brazil for life, while his son, Emperor Pedro I, was both de facto and de jure the monarch of the newly independent country.