Soros nephew?
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Brief search is turning up no such relationship.
Yes, you’re correct. Beginning to think the Uncle Soros meme was more meme than fact.
The only direct connection that I ever saw publicized, between Soros and Chelsea Clinton, was the grounds on which the elaborate wedding was performed and celebrated was, at the time, owned by the Soros family. George himself or his son, who is wealthy in his own right.
That location and owner is easy enough to track in the print coverage of the wedding, but like the Oracle, I was too lazy to hunt it down. :(