Manon is a French diminutive of Marie — itself the French form of Mary, from the Hebrew Miriam. The exact meaning of Miriam is debated; possibilities include "bitter," "beloved," "longed-for child," or "princess of the sea."
Manon has been used in France for centuries. Today Manon is one of the most popular girl names in France.
Manon 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 Manon reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.