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Male Duke John IV De Montfort Of Brittany Click to view Duke John IV De Montfort Of Brittany in the family tree

John IV is no longer alive.

John IV's first family with Princess Mary Plantagenet Of England

‌John IV and Mary were married in a religious ceremony in July 1361.


John IV's second family with Princess Joanna De Navarre

‌John IV and Joanna were married in a religious ceremony in 1386.  They had a son named Richard.

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