This is like name a girl Vicomte or Duc or something, especially considering it is feminine. It would be a better boy name than a girl name and even then it would be an awful name, and if a boy named Marquise ever went to France or a French speaking country I wonder what the Frenchmen and Frenchwomen would have to say about his name. If you want your child to have a French sounding name, why not give him an actual French name?