Name for Spanish Commonwealth?

I don't speak any Spanish, so could anybody suggest a likely name for a Commonwealth-type organisation evolving from the Spanish Empire? If it came into existence (assume Napoleon was butterflied away) what do you think the divisions would be?
 
Possible names would be:
Spanish/Hispanic Commonwealth (Mancomunidad Española/Hispánica), Spanish/Hispanic Crown (Corona Española/Hispánica) or Overseas Union (Unión de Ultramar).
As for it's division, likely one per viceroyalty, with members being New Spain, New Granada, Peru, La Plata, Spain proper and the East Indies, with other candidates being New Galicia, Chile, the Antilles, Aragon, Africa, Venezuela and California/New Mexico/Whatever lies to the north.
 
As it´s say nothing short of and Empire will suffice for the Spanish Crown so I propose Imperio Español Mancomunado de Ultramar y sus dependencias ( Spanish Empire overseas commonwealth and their dependencies, in part because the Spanish love their long names
 
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