Marcellina is the diminutive of Marcella, from the Latin marcellus (little Mars-hammer). Saint Marcellina (c. 330-c. 398) was the elder sister and spiritual mentor of Saint Ambrose, Bishop of Milan — a Roman consecrated virgin to whom Ambrose dedicated his treatise De virginibus.
Featured in Ambrose's correspondence.
Marcellina 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 Marcellina reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.