Marcelle is from the French / Maltese Marcelle — feminine of Marcel — from the Latin Marcellus (small Mars, dedicated to Mars). Marcelle is one of the Maltese + French + Belgian feminine names. Maltese + French feminine name.
Marcelle 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 Marcelle reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.