The Duchy of Veragua

I probably know just as little as you do, but while reading that article a thought occurred to me: if the duke was more successful at controlling his fief, might this set a standard for more duchies / feudal creations in New Spain?
 
I also know as much as is wirten in the article but maybe if we set up some settlement (it is not said that he did so he might not have and that is what i am baseing this upon), then he could a place were he could slowly spread his control of his power. I do think that if this does work then we could see a more duchies in the new world and could change how other coloinal powers divide up there lands.
 
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