Looking for George Charles Davis Decendents IN Cobar Dubbo Forbes Parkes

I have traced the George Charles Davis that MAY be my Grand father .
I now need to confirm this is correct.
I DNA test will confirm and fill in all the gaps I have.
I am looking for a continuous line of male davis decendents of this Geo Chas Davis.
One family thats of interest is the Family of Amos Robert Davis born Bourke abt 1882

can any one help?
Rosco12