Circe "Cece" Ourania Polymnia de Mauvaisefoi Circe is the daughter of Ambrose de Mauvaisefoi and Catarina Guerrero, and the step-daughter to Euporie Blackrose. Circe is the younger sister to Eridanus, and Ambrosia and the older sister to Draco, Dracaena, Amphitrite, and Nais.
Her half-siblings are Persephone, Galatea, Asterion, Theseus, Icarus, twins Melanie and Phoebe and Sterope. She is also the sister her father's bastards Antonia, Sebastian, Silas, Rein, Trinity, Seth, and Adonis.
Circe is the Latinized form of Greek Κιρκη (Kirke), which possibly meant "bird". In Greek mythology Circe was a sorceress who changed Odysseus's crew into hogs but was forced by him to change them back.
Ourania is derived from Greek ουρανιος (ouranios) meaning "heavenly". In Greek mythology she was the goddess of astronomy and astrology, one of the nine Muses.
Polymnia means "abounding in song", derived from Greek πολυς (polys) "much" and ‘υμνος (hymnos) "song, hymn". In Greek mythology she was the goddess of dance and sacred songs, one of the nine Muses.
Her surname is Mauvaisefoi meaning 'bad faith' in French.