Looking for Williams Family

I am researching my G.G.F. Alfred Williams, born in Westbury, Wiltshire England son of John Williams
and Charlotte Bunker, He married Mary Cooney born in Clare Ireland the daughter of Dennis Cooney and
Catherine Malone. They married in Roma Queensland on the 10th March, 1868. Their children were
Frances, Kathleen, Frederick, Anna Maria (my grandmother) John and Kathleen.

Any information would be greatfully received.