Marilyn vos Savant is of an Italian, Czechoslovak, German, and Austrian ancestry.
Marilyn vos Savant was born on August 11, 1946 in St. Louis, Missouri, United States, to parents Joseph Mach, a merchant and son of a coal miner, and Marina vos Savant, a daughter of a coal miner.
Although vos Savant's family was aware of her exceptionally high I.Q. scores on the Stanford-Benet test when she was 10 years old (she is also recognized as having the highest I.Q. score ever recorded by a child), her parents decided to withhold the information from the public in order to avoid commercial exploitation and assure her a normal childhood.