Graziella is the Italian diminutive of Grazia — from the Latin gratia (grace, favor). Graziella Concas — Italian feminist writer. Graziella Galvani — Italian actress. Princess Graziella — modern royal heritage.
Graziella 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 Graziella reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.