The Son of La Beltraneja

How might the War of the Castilian Succession have turned out if Juana la Beltraneja had turned out a son by her husband, Afonso V of Portugal?
 
Assuming they still lose, the final peace treaty would be rather different. For one, Afonso is unlikely to separate from La Beltraneja, place her in a monastery or countenance her betrothal to the eldest son of Isabella. I imagine peace would be a lot harder to achieve - now there is a young prince of Asturias for Beltraneja's followers (and Portuguese support) to rally around, while it will be a few years before Isabella produces a son. Presumably Afonso would be more vigorous asserting the rights of his young son versus those of his niece-wife. If so, the French might be more forthcoming in meddling in Navarra; if La Beltraneja was able to produce a daughter after her son, the girl would make a nice match for Louis XI's only grandson Charles of Clermont.

La Beltraneja is forever a danger to Isabella and Ferdinand while she is Queen consort of Portugal, just as Isabella would forever be a danger to La Beltraneja (as Queen of Castille) so long as she was Queen consort of Aragón. A double marriage between their children would be the ideal solution.

The results for Portuguese and Castilian colonial affairs, re: Guinea, re: the Atlantic, might also have significant repercussions on the development of the colonial period, the discovery/exploration/settlement of Africa and the New World, international law, the Catholic church and in due time the Reformation.
 
Assuming they still lose, the final peace treaty would be rather different. For one, Afonso is unlikely to separate from La Beltraneja, place her in a monastery or countenance her betrothal to the eldest son of Isabella. I imagine peace would be a lot harder to achieve - now there is a young prince of Asturias for Beltraneja's followers (and Portuguese support) to rally around, while it will be a few years before Isabella produces a son. Presumably Afonso would be more vigorous asserting the rights of his young son versus those of his niece-wife. If so, the French might be more forthcoming in meddling in Navarra; if La Beltraneja was able to produce a daughter after her son, the girl would make a nice match for Louis XI's only grandson Charles of Clermont.

La Beltraneja is forever a danger to Isabella and Ferdinand while she is Queen consort of Portugal, just as Isabella would forever be a danger to La Beltraneja (as Queen of Castille) so long as she was Queen consort of Aragón. A double marriage between their children would be the ideal solution.

The results for Portuguese and Castilian colonial affairs, re: Guinea, re: the Atlantic, might also have significant repercussions on the development of the colonial period, the discovery/exploration/settlement of Africa and the New World, international law, the Catholic church and in due time the Reformation.

Might the Habsburgs be kept out of Spain that way - say if Isabel of Castile marries La Beltraneja's son, and Juan of Aragon, prince of the Asturias marries her daughter? Or could Juana's heirs still come from behind to take the crown?
 
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