Saint Natalia instructed her husband and other prisoners on the Christian faith.
St. Natalia has no particular patronages assigned to her at this time.
3rd century
Saint Natalia is recognized as a Christian martyr and saint in the Eastern Orthodox Church. She is not widely recognized in the Catholic tradition.
Saint Natalya is the patron saint of converts and martyrs.
Saint Patricia of Nicomedia was martyred about the year 304 at Nicomedia (in modern Turkey).
There is not one that I can find, but I would recommend Saint Natalia, wife of Saint Adrian of Nicomedia. He was a Roman Soldier martyred for the faith and she cared for him and other Christians awaiting martyrdom before her death, which may have been a martyrs death also.
The relics of Saint Juliana of Nicomedia are believed to be in the Church of Saint George in Istanbul, Turkey. They were transferred there in the 13th century.
The patron saints of jailers or prison guards are:Adrian of Nicomedia Hippolytus of Rome Martinian of Rome Processus
There are several saints named Natalia so you need to be more specific.
All these saints are memorialized on July 27: Alphonsus Pacheco Anthusa Arethas Aurelius Bartholomea Capitanjo Constantine Cunegundes Dionysius Ecclesius Felix of Nicomedia George Hermippus Hermocrates Hermolaus John Serapion Jucunda of Nicomedia Julia of Nicomedia Lillian Lucy Bufalari Malchus Maria Grazia Tarallo Martinian Mary Magdelene Martinengo Maurus Maximaian Natalia Pantaleon Robert Nutter Rudolf Aquaviva Theobald of Marly
The following saints are memorialized on July 27: Alphonsus Pacheco Anthusa Arethas Aurelius Bartholomea Capitanjo Constantine Cunegundes Dionysius Ecclesius Felix of Nicomedia George Hermippus Hermocrates Hermolaus John Serapion Jucunda of Nicomedia Julia of Nicomedia Lillian Lucy Bufalari Malchus Maria Grazia Tarallo Martinian Mary Magdelene Martinengo Maurus Maximaian Natalia Pantaleon Robert Nutter Rudolf Aquaviva Theobald of Marly
St. Barbara of Nicomedia is the patroness of the mission.