We have several TLs with surviving Miguel da Paz. I wonder what would happen if only child of Manuel of Portugal and Isabella of Castile is born as girl (propably also named Isabella)?
First scenario (that one is easy): both daughter and mother survives, but Isabella and Manuel have no more children. In such case younger Isabella, undisputed heiress to all 3 Kingdoms, could just marry her cousin Jaime Braganza (who is next in succession line to the Portuguese throne after her, or Teodosio, if Jaime's OTL marriage is not butterflied away) and we'll have Braganza Iberian Union.
Second scenario (that one is more complicated): Say Isabella of Castile still dies soon after giving birth, but her daughter is healthly and lives to adulthood. Manuel as 30 years old widower without sons would surely remarry, and if he had son(s), he'll be heir to Portuguese throne. What would happen then with Manuel's oldest daughter? She can't marry future Portuguese King, who'll be her half-brother ITTL. Braganza OTOH is still possible.
First scenario (that one is easy): both daughter and mother survives, but Isabella and Manuel have no more children. In such case younger Isabella, undisputed heiress to all 3 Kingdoms, could just marry her cousin Jaime Braganza (who is next in succession line to the Portuguese throne after her, or Teodosio, if Jaime's OTL marriage is not butterflied away) and we'll have Braganza Iberian Union.
Second scenario (that one is more complicated): Say Isabella of Castile still dies soon after giving birth, but her daughter is healthly and lives to adulthood. Manuel as 30 years old widower without sons would surely remarry, and if he had son(s), he'll be heir to Portuguese throne. What would happen then with Manuel's oldest daughter? She can't marry future Portuguese King, who'll be her half-brother ITTL. Braganza OTOH is still possible.
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