Prince of Portugal as well as the the eighth child of Ruler John III of Portugal who have inherited the throne if not for his loss of life from disease. He survived his four more youthful siblings, who passed away in child years, but was continuously sick developing up. He wedded his first cousin, Joanna of Spain. He passed away before the delivery of his child, who become Ruler Sebastian I. He was heir to his country’s throne, like Prince George Alexander Louis of Britain.