Ferdinand of Aragona didn't marry Isabelle of Castille

Ferdinando didn't marry Isabelle, and remains two different Kindgdom. Moreover, the Navarra Kingdom still exists.

What would happen?
 
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It wouldn't have to matter if they never married, if the legitimate heiress of Castile, Joanna, had succeeded her father, instead of Isabela, who was a half-sister. Joanna married the King of Portugal, and could have merged the crowns of Portugal and Castile, instead of Castile and Aragon. Castile was already outward-looking, as was Portugal, and instead of dividing the New World between them, the united kingdom would have taken practically the whole thing. Aragon would have stayed a Mediterranean power and could have become even more involved in Italian (and perhaps North African) affairs.
 
If Castile and Portugal merged, what would the linguistic consequences be? Would Spanish or Portuguese dominate? Would they go East or West first? Maybe Columbus and Da Gama race to discover the Indies first?
 
It wouldn't have to matter if they never married, if the legitimate heiress of Castile, Joanna, had succeeded her father, instead of Isabela, who was a half-sister. Joanna married the King of Portugal, and could have merged the crowns of Portugal and Castile, instead of Castile and Aragon.

I presume you mean Joana la Beltraneja. In that case, wouldn't the guy who married Isabel try to gain the throne anyway, given the questions about Joana's paternity? If Isabel doesn't marry Fernando - and she obviously isn't going to marry a member of the Portuguese royal family - then who does she marry? A Castilian nobleman like the Duke of Alba or Medina Sidonia, or a relative of the French King, or someone with no ability to push for her claim to the throne?
 
I presume you mean Joana la Beltraneja. In that case, wouldn't the guy who married Isabel try to gain the throne anyway, given the questions about Joana's paternity? If Isabel doesn't marry Fernando - and she obviously isn't going to marry a member of the Portuguese royal family - then who does she marry? A Castilian nobleman like the Duke of Alba or Medina Sidonia, or a relative of the French King, or someone with no ability to push for her claim to the throne?

Gaston of Foix, heir to Navarre, was of a reasonable age to marry Isabella, if he wanted to try to press a claim to the Castilian throne. I don't know how strong Navarre was at the time, if a Portugal/Castile union army marched on Navarre, that would probably have been the end of Navarre as an independent nation.
 
I don't know how strong Navarre was at the time

250px-Conquista_de_Navarra.svg.png


...Yeah, not strong, eh?

Still, if they had substantial support from the Castillian grandees, plus maybe Aragon or France, then they stand a chance of pressing Isabel's claim. That said, about halfway through the war, Isabel's going to be thinking to herself "Why the everloving Bejeezus didn't I marry Fernando of Aragon?!"
 
I presume you mean Joana la Beltraneja. In that case, wouldn't the guy who married Isabel try to gain the throne anyway, given the questions about Joana's paternity? If Isabel doesn't marry Fernando - and she obviously isn't going to marry a member of the Portuguese royal family - then who does she marry? A Castilian nobleman like the Duke of Alba or Medina Sidonia, or a relative of the French King, or someone with no ability to push for her claim to the throne?
She was betrothed to the Duke of Guyenne, a Valois perhaps that marriage could push through.
 
Well, an interesting plan that was on the table was Isabella to marry Edward IV, which was seriously considered by the anti-Warwick faction to escape another French marriage. While another proposed match was Ferdinand to Marie of Burgundy. Now an Anglo-Castilian union alongside a Burgundian-Aragonese one would be interesting. Poor Portugal and Navarre...:p
 
It wouldn't have to matter if they never married, if the legitimate heiress of Castile, Joanna, had succeeded her father, instead of Isabela, who was a half-sister. Joanna married the King of Portugal, and could have merged the crowns of Portugal and Castile, instead of Castile and Aragon. Castile was already outward-looking, as was Portugal, and instead of dividing the New World between them, the united kingdom would have taken practically the whole thing. Aragon would have stayed a Mediterranean power and could have become even more involved in Italian (and perhaps North African) affairs.

I just wanted to point out that Joanna la Beltraneja's marriage to Afonso V of Portugal was not designed to unite Portugal and Castille. At the time of the marriage Afonso had an adult male heir (John), when he married Joanna. King John succeeded his father, but John's son Afonso predeceased him. And if was only after Afonso V's grandson died, that any son of Joanna and Afonso become dual heir to Portugal and Castille.
 
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