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How would William Adelin impregnating and having a surviving heir with Matilda of Anjou affect history even if it is posthumous?
Would a son of William Adelin and Matilda of Anjou marry Eleanor of Aquitaine? I just think if he does it needs for William of Aquitaine to die earlier and avoid him having Eleanor be taken care by the King of France and it will happen earlier than the OTL marriage between Henry II and Eleanor.