Colin John Cherry Robertson

HI I AM SEARCHING INFORMATION ON MY BROTHER IN LAW COLIN JOHN ( NOT SURE IF HE WAS BORN UNDER THE NAME OF CHERRY OR ROBERTSON ) HE WAS BORN AROUND 1937 IN ADELAIDE STH AUST WHO DID HE MARRY DID HE MARRY TWICE AND WHAT CHILDREN HE DIED ABOUT 1986 DO HOPE YOU CAN HELP ME