Charles Louis Seeger Jr. was an American musicologist, composer, teacher, and folklorist. He was the husband of the composer Ruth Crawford Seeger, father of the American folk singers Pete Seeger (1919–2014), Peggy Seeger (b. 1935), and Mike Seeger (1933–2009); and brother of the World War I poet Alan Seeger (1888–1916) and children's author and educator Elizabeth Seeger (1889-1973).
