Cinzia is the Italian form of Cynthia — from the Greek epithet of Artemis, born on Mount Cynthus on the island of Delos.
Cinzia TH Torrini (born 1954) is the Italian filmmaker.
Cinzia 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 Cinzia reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.