I heard that if somebody is rich but does not want their name published on Forbes - Forbes will simply "pretend" that they don't exist so there could be somebody who has more money then Bill Gates that does not want his / her name published in the news.
The Rothschild family fortune is worth 700 trillion dollars and they only have one living heir to the entire fortune who is worth $70 000 000 on his own even without inheriting the family fortune. He is married to Nicky Hilton, Paris Hilton's sister.
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Pretty sure there are hundreds of Rothschilds0