It's kind of unclear who specifically is the one patron saint of chastity, but many various saints have a strong connection to the subject.
On the female side, we have St. Agnes of Rome from the 200's BC, Maria Goretti (from the 1800's) and of course the Blessed Virgin Mary.
For men, some appropriate patrons of chastity would be St. Thomas Aquinas; St. Francis of Assisi; and even Saint Joseph would be pretty appropriate.
The Patron Saint Index lists Saint Agnes of Rome and Saint Thomas Aquinas as the patron saints for chastity. These are the official patrons as approved by the Vatican.
The patron saints of chastity are Agnes of Rome and Thomas Aquinas
Saint Agnes chose to die rather than lose her virginity.
The Patron Saint Inex lists no patron saints of bears.
The Patron Saint Index lists no patron saint of dinosaurs.
A patron saint is supposed to be a protector in the Catholic religion. Patron Saint Angelico is the patron saint of artists. A patron saint is a protector of life.
As per the Patron Saint Index, there is no patron saint of wrestlers. However, Saint Sebastian is the patron saint of all athletics and athletes.
Saint Lillian is not a patron saint as per the Patron Saint Index.
No, there is no patron saint of billiards.
There is a patron saint of Wales but no patron saint of whales.
There is no patron saint of color.
There is no patron saint of voting.
There is no patron saint of red heads as per the Patron Saint Index.