Named for a Greek warrior, the second son of Theseus and Phaedra {see planet  (174)}. After fighting in the Trojan War, Demophon visited Thrace, where he caused the queen, Phyllis {see planet  (556)}, to fall in love with him. On his return to Athens, Demophon’s neglect of Phyllis’ kindness and love led to her suicide. (M 29669) _ _.