Casey is a common name that can refer to both males and females. It is of Irish origin, derived from the Gaelic name O'Cathasaigh, which means "vigilant" or "watchful." The name has gained popularity in various cultures and is often used in literature and media. In addition to being a name, Casey can also refer to various places, such as Casey, Illinois, a small town in the United States. The name is also associated with the famous poem "Casey at the Bat," which tells the story of a baseball player named Casey who faces a dramatic moment in a game.