I have posted a link below where you can read the complete life of Catherine and see why the Church decided to confer on her the title of Saint.
Catherine of Siena was canonized in the year 1461 by pope Pius II.
There are a number of saints named Catherine so you need to be more specific.
St. Catherine of Siena was a prominent 14th-century mystic and theologian known for her spiritual writings and advocacy for reform within the Catholic Church. She played a crucial role in ending the Avignon Papacy and convincing Pope Gregory XI to return to Rome. Her dedication to Christ and the Church, as well as her mystical experiences and writings, contributed to her significance as a saint.
No there isn't. There is a Saint Catherine though. My sister made the mistake when she made her confirmation under the name Kathleen only to discover there was no such saint. This is true but I'm making my confirmation and I'm picking Kathleen as that is another form of Catherine
Catherine is the patron saint of unmarried girls. A custom began where girls would make taffy to attract a beau on Saint Catherine's Day, November 25. Some countries, especially Canada, still observe the practice. For more information, click on this link.
When the discovery of her remains was made known, 500 years after her martyrdom.
She made intelligent answers regarding Christianity over pagan religions.
Please advise which Saint Anthony you are referring to.
There is no saint named Francis Johnson.
There is a saint named Therese and several others named Teresa but I can find no saint named Theresa.
Perpetua died as a martyr.
She is a real saint. Saint Patrick drove the snakes from Ireland. He was made a saint after his death.