Sempronia is the Latin feminine of Sempronius. Sempronia (1st c. BCE) was the educated Roman noblewoman of the Catiline conspiracy — described by Sallust as a woman of education, wit, and ill repute who had "learning beyond a Roman matron." Sister of the Gracchi.
Featured prominently in Sallust's Bellum Catilinae.
Sempronia 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 Sempronia reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.