Cecilia was a pious and prayerful young woman in the early Church. She was martyred for her faith and died a protracted and painful death over several days but not before she made arrangements for all her property to be distributed to the poor. The early Christians declared her to be a saint based on her holy life and death as a martyr.
The patron saint of sports (athletics) is St. Sebastian, not St. Chloe.
There is no saint named Columbus.
There is no saint named Paricia.
St. Petersburg is the name of a city and not a saint.
Saint Cecilia was canonized by the Catholic Church in the 4th century.
Saint Cecilia of Rome is a patron saint of music along with Saint Arnulf of Soissons.
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There is a St. John the Baptist but no St. John Paul the Baptist.
Andrew is a saint but not a patron saint.
1921
There seems to be no Saint Cadog, however there is Saint Cadoc of Llancarvan. Is this who you were referring to?
Pius XI is not yet a canonized saint.