John II & V of England and Portugal (Hapsburg's Unite)

John II & V (August 25, 1661 - June 6, 1688) became King of both Portugal and England (along with the Algarves and Ireland) and Duke of Brittany on August 25, 1661 at the age of 41, and was crowned on December 25. His mother was Elisabeth of France, and his father was Edward II & VII. John was the second monarch in the Avis-Tudor royal family, but was the eighth monarch in the Tudor house, and the tenth in the Avis house.

In the last year of his life, John finished what his father started, and he created a political union between the nations of England and Portugal (and the Algarves and Ireland.) This created the United Kingdom of Southern Britain and Portugal.

Marriage
John married Maria Eufrosyne of Zweibrücken, sister of Charles X of Sweden in 1638, when John was 18 and Maria was 13. 10 years later Maria fell pregnant with Johns child. Then in November, 1648 Maria gave birth to twins, though the stress of this killed the poor lady. It was a boy and girl. He named the girl Maria after her recently deceased mother, but he named the boy Henry, and the boy would go onto be the first monarch to rule over a fully United Kingdom.