I think Marcel is named after Marcel Marceau..since her father, Jean Claude studied mime. See below:
Jean-Claude would surprise his earthy folks with his ambitions in the world of performance art. As a young man he'd study mime under Etienne Decroux, a revolutionary actor who'd taught Marcel Marceau and ran a school at Boulogne-Billancourt.
Marcel is such a bobo name (bobo meaning bourgeois bohemian for those who are not French).
And yes, I instantly thought about the scene in which Marion cries "Marceeeel" hysterically in her Piaf movie when I heard the news.
Oh well, congrats anyway!!