‘The name Rococo is a combination of the French words rocaille and coquille, which refer to rock work and cockleshell decoration of crescent shape.
In essence, the name of the perfume would translate to “Rock Garden of the Parisienne” These “rock gardens” were often found in fashionable grottoes and caves in aristocratic gardens, irregularly encrusted with seashells and sharp, pointy rocks.
Later in the next century, most likely inspired by Guerlain, the firm of Caron would introduce their Fleurs de Rocaille (Rock Garden Flowers) perfume.’ – Guerlain Perfumes (Blogger)