Ka cika wannan jumla: Hadlee ta auri Lilla Monro a shekara ta 1940. Sun haɗu a jirgin ruwa zuwa Ingila a shekara ta 1937. Suna da 'ya'ya maza biyar. Ya yi alfaharin cewa uku daga cikin 'ya'yansa maza biyar sun wakilci New Zealand: Dayle, mai saurin bugun gwaji, da Barry, mai buga kwallo a wasan farko
1975 Cricket World Cup, Richard ne ya mamaye su, wanda ya zama babban dan wasa: ya dauki wickets 431 na Test - rikodin duniya a lokacin - da wickets 1,490 na aji na farko, kuma ya gama da matsakaicin bugun Test na 27.16. An ba Richard lambar yabo saboda ayyukan da ya yi wa cricket. Ɗan na huɗu, Martin, ya buga wasan kulob a Christchurch.