Simonetta is from the Italian Simonetta — diminutive of Simona — Italian feminine of Simon (from Hebrew Shim'on, hearing). 1485) + Primavera (c.
Simonetta 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 Simonetta reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.