Lust is from the Japanese manga — referencing the Christian Seven Deadly Sins. Lust is a character in Fullmetal Alchemist (2001-2010) and Brotherhood (2009-2010) by Hiromu Arakawa. The FMA manga has sold over 80 million copies worldwide; Brotherhood held #1 on MyAnimeList for over a decade. Lust is one of the seven Homunculi embodying the Seven Deadly Sins. Her Ultimate Spear — extending fingernails into killing weapons — and her death by Colonel Roy Mustang's flame alchemy are antagonist moments.
Lust 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 Lust reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.