Simone is the French feminine of Simon — from the Hebrew Shimon ("he has heard"). Simone de Beauvoir (1908-1986) — French existentialist philosopher whose The Second Sex (Le Deuxième Sexe, 1949) — "One is not born, but rather becomes, a woman" — founded modern feminist philosophy. Partner of Jean-Paul Sartre for 51 years.
Simone does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Simone reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.