Capucine is the French word for the nasturtium flower — itself named after the Capuchin monks' hoods, which the flower's shape resembles.
Capucine (Germaine Lefebvre, 1928-1990) was the French actress and model. The name remains widely used in France.
Capucine 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 Capucine reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.