Cassiopeia \c(a)-ssio-peia\ as a girl's name is pronounced ka-see-a-PEE-a. It is of Greek origin. Possibly means "cassia juice". Greek mythology: Cassiopeia was an Ethiopian queen, the wife of Cepheus and mother of Andromeda, the maiden who was chained to a rock and rescued by Perseus. According to legend, both mother and daughter were placed among the stars after death, and there are constellations named after them.