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Archduke Albert and Infanta Isabel Clara Eugenia had three children - two boys and a girl. None lived past a few months that I am aware of. But say one of their sons survives infancy, but dies before Albert in 1622, likewise, their daughter lives to marry, hopefully have issue etc.
The Treaty of Cession stipulates that a son would inherit the Spanish Netherlands, whilst a daughter would marry either the king of Spain or someone of his choosing. So, for the purposes of this thread, let's assume the son dies 1616-1621, so the prince of the Asturias is already married to his French wife (who lives her OTL lifespan).
The Treaty of Oñate is presumably also affected by the survival of this young archduke.
Emperor Matthias dies in 1618, Albert succeeds him and dies in 1622, leaving only a daughter, Anna Maria Mauritia (b. 1609). How does this affect the 30YW and further ripples across Europe?
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