Cecilia comes from the Roman family name Caecilius, derived from the Latin caecus, meaning "blind." The name had Christian resonance through Saint Cecilia (2nd-3rd century), patron saint of music — to whom Pope Gregory dedicated November 22 as a feast day, and many composers including Britten, Purcell, and Handel wrote Cecilian odes.
Cecilia has been continuously used since the medieval period. Today Cecilia sits in the U.S. top 200.
Cecilia 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 Cecilia reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.