Mucia is the feminine of Mucius. Mucia Tertia (1st c. BCE) was the daughter of Scaevola the Pontifex and the third wife of Pompey the Great — mother of his children Gnaeus, Sextus, and Pompeia.
Featured in Plutarch's Lives.
Mucia 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 Mucia reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.