- Brother of Barron Hilton and Eric Hilton. Half-brother of Francesca Hilton, whose mother is Zsa Zsa Gabor.
- Son of Conrad Hilton, founder of the Hilton Hotel chain, and Mary Adelaide Barron.
- Father of Conrad Nicholson Hilton III (born 1960) and Michael Otis Hilton (born 1961).
- Both of his wives were 18 when he married them.
- He was of Norwegian, German, English, Irish, Scottish, and Welsh descent.
- Is portrayed by Eric Gustavson in Liz: The Elizabeth Taylor Story (1995)
- Stepson of Zsa Zsa Gabor and half-brother of Francesca Hilton.
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