Seeking Ellery Brother Sister

i am trying to find information on my father Alfred Ronald Bertie Southwell Ellery he married Ilma Dorothy Wilson in 1938 in victoria he had a son Kenneth @ a daughter Dorothy he divorced @ married my mum @ fathered 2 girls Joy(ME)@ Julie I havent seen him since I was 4 I know he.d be dead now but I would love to find my family @ some info about my father (when he died,where he.sburied etc)