Manuel I of Portugal
Manuel's mother was the granddaughter of King John I of Portugal, whereas his father was the second surviving son of King Edward of Portugal and the younger brother of King Afonso V of Portugal. In 1495, Manuel succeeded his first cousin, King John II of Portugal, who was also his brother-in-law, as husband to Manuel's sister, Eleanor of Viseu.
John V of Portugal
As John concerned himself with the presentation of Portugal at the court of Europe from home through the planning and organization of important embassies, the king's brother, Infante Manuel, Count of Ourém, was similarly raising the name of Portugal throughout Europe. Having left the country in 1715 without the king's permission (as was required for royalty and high nobility), the Count of Ourém traveled throughout Europe, staying with Portuguese ambassadors and nobles across the continent, causing quite a fanfare. Although the king was displeased that Manuel left without permission, the king forgave the infante, writing to Manuel "your age absolves your mistake". Now having the king's permission, Infante Manuel entered the service of Prince Eugene of Savoy, serving alongside him at the successful Battle of Petrovaradin. Over the next 17 years, the Count of Ourém moved from court to court as a celebrity and military hero and was even considered as a candidate as King of Poland by provision of the 1732 Treaty of the Three Black Eagles. Manuel's adventures throughout the continent inspired several literary works and gained him celebrity, raising Portugal's prestige in the eyes of Europe.