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  • Cleopatra VII of Egypt requested the execution of her sister, Arsinoe IV, (who was guilty of treason) which was carried out under the orders of her husband, then lover, Mark Antony, in 41 BC.
  • Roman emperor Caligula, according to historian Suetonius, killed his sister Drusilla after learning that she was pregnant with his child in AD 38. Most historians now believe that she probably died of fever.[citation needed]
  • Roman emperor Commodus ordered his older sister Lucilla to be put to death in AD 182, after she was implicated in plots with members of the Senate to overthrow him.