Cepheus
Κηφεύς
The Ethiopian king who nearly paid for his wife's boast with his daughter. Now a constellation in the northern sky.
Because his wife Cassiopeia boasted she was more beautiful than the sea nymphs, an oracle forced him to chain his daughter Andromeda to a rock by the sea.
Perseus happened to be passing, slew the monster, and became his son-in-law.
Cepheus, Cassiopeia, Andromeda, Perseus — the whole family became constellations, still side by side in the northern sky. Only Cassiopeia, as punishment, spends half the year circling upside down.
SourcesApollodorus, Library