Answer
Pope John XIX was the son of Marozia, a noblewoman from the powerful Counts of Tusculum family. Marozia's first husband was Pope Sergius III, and she had three children with him, including John XIX. She also had two children with her second husband, Pope John XI. Marozia's power and influence helped her sons to become Popes, and John XIX was the last of the Tusculum Popes.