The Carter Family

The Carter Family was a country music group that recorded between 1927 and 1956. Their music had a profound impact on bluegrass, country, southern gospel, pop and rock musicians as well as on the U.S. folk revival of the 1960s. They were the first vocal group to become country music stars. Their recordings of such songs as "Wabash Cannonball," "Will the Circle Be Unbroken," "Wildwood Flower" and "Keep On the Sunny Side" made them country standards.

The original group consisted of Alvin Pleasant "A.P." Delaney Carter (1891-1960), his wife Sara Dougherty Carter (1898-1979), and his sister-in-law Maybelle Addington Carter (1909-1978). Maybelle was married to A.P.'s brother Ezra (Eck) Carter and was also Sara's first cousin. All three were born and raised in southwestern Virginia, where they were immersed in the tight harmonies of mountain gospel music and shape note singing. Maybelle's distinctive guitar playing style became a hallmark of the group.

From Wikipedia