How?
Navarre's inheritance was never in contention since they allowed female rule.
You'd somehow need Edward I's first wife to die before 1284 (so no OTL Edward II) and have him marry Joan of Navarre which seems unlikely given French influence at the time.
A better option is for Henry I of Navarre to have his son Theobald survive but who only has a surviving daughter married to Thomas Earl of Norfolk or Edmund Earl of Kent (children by Edward I's second marriage to Marguerite of France). This would then give you a Plantagenet* King of Navarre albeit not King of England but it would make an alt-HYW fairly interesting.
*Not that they would use "Plantagenet" since that was only first used during the War of the Roses.
The question is how will it survive?How?
Navarre's inheritance was never in contention since they allowed female rule.
You'd somehow need Edward I's first wife to die before 1284 (so no OTL Edward II) and have him marry Joan of Navarre which seems unlikely given French influence at the time.
A better option is for Henry I of Navarre to have his son Theobald survive but who only has a surviving daughter married to Thomas Earl of Norfolk or Edmund Earl of Kent (children by Edward I's second marriage to Marguerite of France). This would then give you a Plantagenet* King of Navarre albeit not King of England but it would make an alt-HYW fairly interesting.
*Not that they would use "Plantagenet" since that was only first used during the War of the Roses.
Couldn't Henry Bolingbroke and Jeanne of Navarre's son fight for his rights for Navarre once Charles Evreux III dies heirless?
The question is how will it survive?
Not really. Her son's by John V of Brittany have precedence.
Yes, but they are busy in Brittany not in Navarre.