WI: Alfonso IV of Portugal dies without issue?

IOTL, King Denis of Portugal, over his 45 year reign, had only two legitimate children by his wife, Elizabeth of Aragon, a son, the future Alfonso IV, and a daughter, Constance, who married King Ferdinand IV of Castile.

When Denis died in 1325, Alfonso IV succeeded him and had issue. However, what if Alfonso had died sometime between his birth in 1291 and his marriage to Beatrice of Castile in 1309? Denis' legitimate heir would be his daughter, Constance. Depending on when Alfonso dies, how much resistance would there be to a union with the Kingdom of Castile? Would the Portuguese nobles accept Constance as Queen or would they support one of Denis' bastards?

Any thoughts?
 
IOTL, King Denis of Portugal, over his 45 year reign, had only two legitimate children by his wife, Elizabeth of Aragon, a son, the future Alfonso IV, and a daughter, Constance, who married King Ferdinand IV of Castile.

When Denis died in 1325, Alfonso IV succeeded him and had issue. However, what if Alfonso had died sometime between his birth in 1291 and his marriage to Beatrice of Castile in 1309? Denis' legitimate heir would be his daughter, Constance. Depending on when Alfonso dies, how much resistance would there be to a union with the Kingdom of Castile? Would the Portuguese nobles accept Constance as Queen or would they support one of Denis' bastards?

Any thoughts?

My knowledge of Portuguese history is shaky, but wouldn't them accepting Costanca as queen depend on who she's married to?
 

Lusitania

Donor
My knowledge of Portuguese history is shaky, but wouldn't them accepting Costanca as queen depend on who she's married to?
We had two succession crises in Portuguese history and in both cases the eldest daughter of the king was married to king of Castile. In 1383-1385 the Portuguese nobles rejected Union with Castile and while outnumbered 3-1 defeated Castile and remained independent. Then in 1580 we again went through the same situation but our forces lost and king of Spain also became king of Portugal. Although the two countries were governed separately. In 1640 we once again became free of Spain.
 
We had two succession crises in Portuguese history and in both cases the eldest daughter of the king was married to king of Castile. In 1383-1385 the Portuguese nobles rejected Union with Castile and while outnumbered 3-1 defeated Castile and remained independent. Then in 1580 we again went through the same situation but our forces lost and king of Spain also became king of Portugal. Although the two countries were governed separately. In 1640 we once again became free of Spain.

So, if Constance is still married to Ferdinand, there's likely a 50-50 chance of it going either way, correct?
 
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