Lucilla

Annia Aurelia Galeria Lucilla or Lucilla (7 March 148 or 150 – 182) was the second daughter of Roman emperor Marcus Aurelius and Roman empress Faustina the Younger. She was the wife of her father's co-ruler and adoptive brother Lucius Verus and an elder sister to later emperor Commodus. Commodus ordered Lucilla's execution after a failed assassination and coup attempt when she was about 33 years old.