"Mother" Maybelle Carter (born Maybelle Addington; May 10, 1909 – October 23, 1978) was an American country musician and "among the first" to use the Carter scratch, with which she "helped to turn the guitar into a lead instrument." It was named after her. She was a member of the original Carter Family act from the late 1920s until the early 1940s and a member of the Carter Sisters and Mother Maybelle group.

Source: Wikipedia (https://en.wikipedia.org/wiki/Maybelle_Carter)