Toots Thielemans ( born Jean-Baptiste Frédéric Isidor , Baron Thielemans on 29 April 1922 , Brussels , Belgium ) is a Belgian jazz musician .
Jean-Baptiste Frédéric Isidor , Baron Thielemans ( born 29 April 1922 , Brussels , Belgium ) , known as Toots Thielemans , is a jazz musician .