With the exception of the British royal one, is there a list of the aristocracy/nobility that were close with him?
If that Andrew one gave him his closest attention, then it's clear he was in contact with all other "sirs, dames, vons, zus, d's, des, de las, bin al-s" and so on.
This mustn't be overlooked, given the world's history between the "du sang" throughout various kingdoms and the rest of the nations.
