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This is my first thread on this forum, so I'm gonna try an idea I had for a while.

Peter, duke of Coimbra was the second son of John I of Portugal and Philippa of Lancaster. Is there any chance of butterflying his death in 1449? A older Alfonso V of Portugal? The duke of Braganza dying before Duarte I of Portugal?

What would the consequenses be of a surviving Peter?
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