A saint's name is the name of a person who was really good and did nice things according to the rules of a special religion. People who follow this religion give their children the name of a saint because they believe it will bring them good luck and help them be good too. It's like having a superhero's name! Some people also choose a saint's name for themselves when they convert to this religion or when they become confirmed in the religion. It's kind of like picking a new nickname for yourself. So, a saint's name is a special name that comes from a really good person in a religion, and it can help people be good like the saint.