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.
Manuel II of Portugal
Although it is not likely that such a pact will have taken place, it is said that in 1922, with cooling of relations between monarchists, Integralismo Lusitano and the King, and mindful that his marriage to Augusta Victória had not produced heirs, Manuel, in a Paris meeting in April 1922, represented by his adjunct Aires de Ornelas, and Miguelist representatives Infanta Adelgundes, who was by now calling herself Duchess of Guimarães, and tutor to Duarte Nuno, agreed that owing to an heir, the rights of succession would pass to Duarte Nuno. Integralists disagreed because in their view the agreement failed to make reference to the reestablishment of a traditional monarchy, which was fundamental to their assertions. Integralismo Lusitano withheld their support, and on September 1925, Aldegundes in a letter to Manuel, repudiated the agreement owing the continue operation of the Constitutional Newspaper (the Integralist paper was closed as part of the accord) and the lack of Integralist participation.