So Henry IV of France was married to his cousin Margaret of Valois in 1572, and their marriage was annulled in 1599, however, what I am wondering is, what might happen if they have children? How might him having children earlier influence the wars of religion and his own succession to the french throne, if indeed it does happen? How might this affect France later on down the line?
His children:
Henry b 1573
Louis b 1577
Charles b 1580
Henrietta b 1582