C J S Purdy was married in 1934 to Anne Crakanthorp (1915–2013), the daughter of twice Australian Chess Champion, Spencer Crakanthorp. The marriage produced two children,
John and Diana. John died in 2011. He was survived by his wife, Felicity, and their sons Colin and Michael and families.
About John Purdy: https://www.smh.com.au/national/ches...018-1lymf.html
Diana was a keen chess player. She married leading New Zealand player Frank Hutchings in 1960. They produced two daughters, Fleur and Alexandra and a son, Ross, according to the account below.
There were two other children, according to other accounts.
http://newzealandchess.co.nz/nzchess...fs/2018-04.pdf Page 33.