Flanagan is a surname of Irish origin, often associated with various notable individuals and families. It is derived from the Gaelic name O'Flannagain, which means "descendant of Flannagan." The name has historical significance in Ireland and is linked to various regions, particularly in County Kerry and County Clare. In addition to being a surname, Flanagan can refer to several places and institutions, such as Flanagan, Illinois, a small village in the United States. The name is also used in popular culture, appearing in literature and film, often representing characters with diverse backgrounds and stories.