Seaking Infomation About Family

Hi my name is Ray Verdon I live in Australia and am looking for infomation about my family, looking to follow the main trunk with short side tracks the main intrest being
Ray Verdon married to Joan Sullivan
Clarence Verdon married to Beryl Probine
Frances Verdon married to Anna Vonthien
James Verdon married to Margaret Sheehan
I am having a problem trying to trace back past James as on documents he only put a mother and this was shown as Mary Gallagher so trying to find a where and when is hard