Patsy is a 19th-century English diminutive of Patricia — from the Latin patricius ("noble, of noble birth"). Patsy Kensit — British actress.
Patsy 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 Patsy reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.