Monarchy of the United Kingdom children, she was succeeded by the Scottish monarch James VI, who was the great-grandson of Henry VIII's older sister and hence Elizabeth's first cousin twice removed. James VI ruled in England as James I after what was known as the "Union of the Crowns". Although England and Scotland were in personal union under one monarch – James I became the first monarch to style himself "King of Great Britain" in 1604 – they remained two separate kingdoms. James I's successor, Charles I, experienced frequent conflicts with the English Parliament related to the issue of royal and parliamentary powers, especially the
John VI of Portugal is the principle behind membership in royal houses, as it can be traced back through the generations, which means that John VI is, ultimately, a member of the Robertian dynasty. John VI of Portugal John VI (Portuguese: "João VI"; – ), nicknamed "the Clement", was King of the United Kingdom of Portugal, Brazil and the Algarves from 1816 to 1825. Although the United Kingdom over which he ruled ceased to exist "de facto" beginning in 1822, he remained its monarch "de jure" between 1822 and 1825. After the recognition of Brazilian independence under the Treaty of Rio de Janeiro of