WI: Mongol Namayan or a Mongol state in the Philippines

I remember, Sasaban of Namayan was married to the ruler of Majapahit at its founding and it was around the time when the mongols sacked Java, what if Sasaban married a younger brother of Kublai Khan instead passing the Principality of Namayan to the house of Borgijin.
 
The most the Yuan can get out of this is a tribute state with minimal intervention from Beijing (such was the case for other distant tributaries such as Singapura). They probably won't care about it, though a fair bit of legitimacy and trade from southern China could be obtained by Namayan through this relationship. In fact, chances of a Yuan dynasty prince marrying into a lesser family is very slim, unless he's meant to be excluded from the succession without resorting to usual methods (i.e. 'accident').
 
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