Raphael Florian is so fun! Here are some sibling ideas:
Boys:
Damian
Dorian
Florentin
Marcellin
Hilarion
Aramis
Albion
Cassian
Erasmus
Erastus
Inigo
Ossian
Sabien
Silvan
Tobias
Zorion
Girls:
Cosima
Allegra
Athena
Ginevra
Bianca
Cassia
Flora
Helena
Chiara
Estella
Xanthe
Finola
Ilaria
Pierra
Vivia
Elettra