Clarice is from the Latin Claritia (brilliant, clear). Clarice Lispector (1920-1977) — Ukrainian-born Brazilian novelist — is widely considered one of the most important Latin American writers of the 20th century.
The most translated Brazilian author in history.
Clarice 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 Clarice reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.