Simone de Beauvoir, French philosopher and author (died 1986)

Simone Lucie Ernestine Marie Bertrand de Beauvoir was a French existentialist philosopher, writer, social theorist, and feminist activist. Though she did not consider herself a philosopher, nor was she considered one at the time of her death, she had a significant influence on both feminist existentialism and feminist theory.

January 9 is the ninth day of the year in the Gregorian calendar; 356 days remain until the end of the year.