In Greek mythology, Pyrrhus is the grandson of what immortal nereid?
Pyrrhus (Royer) Pyrrhus is an opera by the French composer Joseph-Nicolas-Pancrace Royer, first performed at the Académie Royale de Musique (the Paris Opera) on 26 October 1730. It takes the form of a "tragédie en musique" in a prologue and five acts. The libretto, by Fermelhuis, is based on the Greek myth of Pyrrhus, son of Achilles.
Phineus (son of Belus) In Greek mythology, Phineus (Greek: Φινεύς , ] ) was a son of Belus by Anchinoe and thus brother to Aegyptus, Danaus and Cepheus. He had been engaged to Cepheus' daughter Andromeda before she wed Perseus, and Phineus plotted against him, leading Perseus to turn him and his co-conspirators into stone by showing them the head of Medusa. The affair appears to have formed part of Euripides' lost "Andromeda", but the sole extensive ancient treatment is found Ovid's "Metamorphoses".