According to her acta, written by the Bollandists in the 8th century, and the Martyrology of Reichenau, she was a Roman virgin of the early Christian church, daughter of Saint Pudens, friend of the Apostles, and sister of Praxedes.
Praxedes and Pudentiana, together with presbyter Pastor and Pope Pius I, built a baptistry in the church inside their father's house, and started to baptize pagans.
Pudentiana died at the age of 16, possibly a martyr, and is buried next to her father Pudens, in the Priscilla catacombs on the via Salaria.

While there is evidence for the life of Pudens, there is no direct evidence for either Pudentiana or Praxedes.
It is possible that the early Church's "ecclesia Pudentiana" (i.e., the Church of Pudens) was mistaken for "Saint Pudentiana".
According to her acta, written by the Bollandists in the 8th century, and the Martyrology of Reichenau, she was a Roman virgin of the early Christian church, daughter of Saint Pudens, friend of the Apostles, and sister of Praxedes. Praxedes and Pudentiana, together with presbyter Pastor and Pope Pius I, built a baptistry in the church inside their father's house, and started to baptize pagans. Pudentiana died at the age of 16, possibly a martyr, and is buried next to her father Pudens, in the Priscilla catacombs on the via Salaria.
While there is evidence for the life of Pudens, there is no direct evidence for either Pudentiana or Praxedes. It is possible that the early Church's "ecclesia Pudentiana" (i.e., the Church of Pudens) was mistaken for "Saint Pudentiana".
Pudentiana