Biography
June Jackson, William E. Jackson and J.J. Jackson are three names for the same guy: an American soul singer of the 1960s from Los Angeles, CA, who frequently recorded with The Jackals. Jackson released many a 45 in the 1960s and 1970s, on various labels, but two of his records were credited to J.J. Jackson & The Jackaels (why the remarkable spelling of 'Jackals' - we do not know).
Biography text from Last.fm, available under CC BY-SA.