WI:Isabel of Brazil, Queen Mother of Belgium

Brainstorming to a timeline that I am planning:
In our timeline, princess Isabel of Brazil has married the Count of Eu, but before that her father, Pedro II, considered marry his daughter with Prince Phillipe, son of Leopold I and brother of Leopold II.
What if this happen? In view of the older son of Phillipe, Albert, became king of Belgium because his uncle doesn’t have a male son alive.
And in this period, Phillipe has the propose of the crown of Romania and of Greece, but he refused. Can Isabel convince him to accept one of this crowns? And what crown is more probably that he accept? (considering that his father refuse the crown of Greece before became belgian king)
 
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