Mr and Mrs Norman of 48 The Rock, Pilton, had four sons. They were, in order, John (born 17 October 1931, died 15 January 1996), Peter (known as Roy) (born 16 November 1933, died 11 January 2004), Robert (born 1st November 1939, died 19 April 1991) and Graham (born 16 December 1942, died 11 July 1995).
Thanks to John Norman (no relation) for this information.