Since my original post about my David Gordon brick wall, I have found some additional information, which has partially knocked down the brick wall.
I have now found that William’s parents were in fact David and Margaret Gordon. This rules out David Gordon and Mary Deans being his parents.
I have also found that William had at least two siblings.
Ann Gordon was born about 1824 In Belfast Ireland. She travelled to New South Wales in 1855 on the “Lord Hungerford”, stating that she had a brother William living at Kiama. By 1861 she was in Queensland. She married Owen Davis, and they had three children. Ann Davis died in Maryborough Queensland 17 December 1905.
Alexander Gordon appears to have remained in Ireland. Nothing more is known about him at this stage. Further research on Alexander, and any other siblings, is still required.
Thank you William for leaving bequests to these two siblings in your will. If not for that, I may never have found them.