I'll try to clear these questions up:
1. There have been rumors that HM King Constantine fathered a child with Charlotte Ford, who, Marlene has pointed out, is the daughter of Henry Ford II.
2. Charlotte Ford was briefly married to the shipping tycoon Stavros Niarchos, who married her in between the two Livanos sisters he married, Eugenia and Tina. Charlotte Ford later married Anthony Fortsmann and Edward Downe. Tina Livanos was also married to Aristotle Onassis and the 11th Duke of Marlborough.
3. The only child of the Ford/Niarchos marriage was Elena Ford Niarchos (b, 1966), whose share of the Niarchos billions has been challenged legally by his children by Eugenia Livanos. Greek courts ruled that the Niarchos/Ford marriage was never consummated and that Elena is hence not a legitimate heir. The Niarchos billions are being held in trust at the present time, and Elena Ford Niarchos lives in the US with her second husband and children.
4. Paris Hilton (and before that, one of the Olsen twins) was involved at one time with Stavros Niarchos III (b. 1985), who is the son of Phillip Niarchos, son of the tycoon.
5. Aspasia Manos, later Princess of Greece, had only one grandchild, the son of her only child, Princess Alexandra of Greece by her husband King Peter of Yugoslavia - HRH Crown Prince Alexander of Serbia.
Hope this helps a little.