Cassandra

Greek Daughter of King Priam of Troy and of Queen Hecuba; sister of Helenus, Paris, and Hector. The god Apollo gave Cassandra the gift of prophecy, but when she rejected his advances, he ordained that no one would ever believe her prophecies (which were always accurate). Before the fall of Troy, Cassandra warned the Trojans that the gift-horse of the Greeks was a trick, but no one believed her, and the Trojans suffered defeat (see Trojan War). At the fall of Troy, Cassandra was given as booty to the victorious Agamemnon, king of Argos and Mycenae. Cassandra warned the king that his wife, Clytemnestra, would kill him, but Agamemnon would not believe her. He took Cassandra back to Mycenae. Clytemnestra murdered Agamemnon and Cassandra. The word Cassandra has come to mean someone who is a prophet of doom.