Kelsey is a common name often used for both males and females. It has Irish origins and means "descendant of Ceallach," which translates to "warrior" or "slender." The name has gained popularity in various cultures and is frequently associated with friendly and outgoing personalities. In popular culture, Kelsey can refer to various fictional characters in books, movies, and television shows. For example, Kelsey Grammer is a well-known actor famous for his role in the television series Frasier. The name is also used in various brands and products, making it a recognizable term in different contexts.