Rockin Dopsie
Biography
Alton Jay Rubin (February 10, 1932 – August 26, 1993), who performed as Rockin' Dopsie (sometimes Rockin' Dupsee), was an American zydeco singer and accordion player who had success first in Europe and later in the United States. He played accordion on "That Was Your Mother" on Paul Simon's album Graceland (1986).
Bio from Wikipedia