Complex sentence: First to Patricia Someoneorother in 1943 with whom he had one daughter Christina Thomas (b.19 July 1951), and later to Janice Patricia Thomas with whom he one son, Guy Alexander Ward (b.10 October 1998).
Split into simpler sentences: First to Patricia Someoneorother in 1943 with whom he had one daughter Christina Thomas (b.19 July 1951). His second marriage was to Janice Patricia Thomas with whom he has one son, Guy Alexander Ward (b.10 October 1998).