So far only one of Princess Gracia's granddaughters has her name enlisted amongst the secondary names.
Charlotte Marie Pomeline Casiraghi
HRH Princess Alexandra Charlotte Ulrike Maryam Virginia von Hannover
Pauline
Grace Magui Ducruet
Camille Marie Kelly Gottlieb
Lillian does not appear in the monegasque family tree, so far. Other names:
Princess Antoinette Louise Alberte Suzanne de Monaco
Princess Charlotte Louise Juliette de Monaco
Princess Mary Victoria de Monaco née Lady Hamilton
Princess Antoinette Ghislaine Monaco née Comtesse de Mérode-Westerloo
Princess Florestine Gabrielle Antoinette de Monaco
Princess Maria Caroline de Monaco née Gibert de Lametz
Princess Louise Félicité Victoire de Monaco née d'Aumont, Duchesse de Mazarin
Princess Marie-Catherine de Monaco née des marquises Brignole
Princess Louise-Hippolyte de Monaco
Etc. Etc.