No Samuel is not the father of both John's. John Grail b 1910 parents are Samuel Grail & Margaret Elizabeth Reeks who married 1910. John F Grail b 6 July 1920 d Dec 1987 parents are Christopher Grail & Mary J Reeks who married 1917. I think I might have to get death certificate for Esme Sheila Grail,then may find a maiden name.I have also found a marriage date for Arthur J Grail,which might give a fathers name