Short answers, pulled from the story.
Pudentiana was a Christian virgin and martyr of the second century who refused to worship the Roman emperors Marcus Aurelius and Antoninus Pius as deities. She was the eldest daughter of the Roman senator Saint Pudens and the sister of Saint Praxedes. She died at the age of 16 and is buried in the Priscilla catacombs on the via Salaria in Rome.
Spanish conquistador Miguel Lopez de Legazpi took possession of the territory that became Manila on the 19th of May 1571, which was the feast day of Saint Pudentiana. Legazpi declared her the patroness to mark the occasion.
On the 12th of September 1942, Pope Pius XII issued the Apostolic Letter Impositi Nobis Apostolici at the request of the Philippine episcopacy. It named the Virgin Mary under the title of the Immaculate Conception as principal patroness of the Philippines, with Pudentiana and Rose of Lima as secondary patronesses.
Santa Pudenziana is a basilica in Rome dedicated to the martyr Pudentiana. Her feast day was observed there and across the General Roman Calendar on the 19th of May until the calendar's 1969 revision. The Roman Martyrology still lists her on that date.
There is no direct historical evidence for Pudentiana or her sister Praxedes. Scholars have noted that the early church's records may have been misread and that the name "Saint Pudentiana" could be a grammatical form of her father Pudens's name rather than a separate individual. Evidence does exist for the life of Pudens himself.
Pudentiana is buried next to her father Pudens in the Priscilla catacombs on the via Salaria in Rome.