Donna Godchaux
Donna Jean Godchaux-MacKay, née Thatcher
Born August 22nd 1947, Sheffield, Alabama.
Muscle Shoals, Nashville and Memphis session singer, performed on Elvis Presley's 1969 Memphis recordings, amongst others. Met and married Keith Godchaux, recorded together and with the Grateful Dead. After Keith Godchaux's death, she remarried and returned to Alabama.
http://en.wikipedia.org/wiki/Donna_Jean_Godchaux
http://www.biography.com/people/donna-godchaux-20900507