Penthesilea (Greek: Πενθεσίλεια, romanized: Penthesíleia) was an Amazonian queen in Greek mythology, the daughter of Ares and Otrera and the sister of Hippolyta, Antiope and Melanippe. She assisted Troy in the Trojan War, during which she was killed by Achilles or Neoptolemus. The asteroid 271 Penthesilea, discovered in 1887, was named in her honor. Source: Wikipedia (en)