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Just to clarify, I'm referring to the sons of Edward I by his first wife, Eleanor of Castile - John (b. 1266, d. 1271), Henry (b. 1268, d. 1274), Alphonso (b. 1273, d. 1284) and the future Edward II.

Out of curiosity, what major butterflies would there be if the first three reached adulthood, say, 1290, the OTL year of Eleanor's death?
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