I agree on the Mongal thing. We hedged them back inthe caliphate, but I think it is more than we have the knowledge and skill for to work out what would have happened in Cgina and SE Asia if the Mongols had not succeeded.
Instead, we need to think of the recent last century as one where the end of Mongol rule was less 'straightforward', with Mongolia being the remnant of the Yuan dynasty, and the five successor states having emerged from there. Certainly one or two of these could have taken the same names as previous dynasties, in part to justify their rule, perhaps because the remnants of those families were at the 'helm' of the rebellions against the mongols.
Instead, we need to think of the recent last century as one where the end of Mongol rule was less 'straightforward', with Mongolia being the remnant of the Yuan dynasty, and the five successor states having emerged from there. Certainly one or two of these could have taken the same names as previous dynasties, in part to justify their rule, perhaps because the remnants of those families were at the 'helm' of the rebellions against the mongols.