Hi there,
Danny Oatham that you mentioned in your post is my Grandfather and I am currently trying to trace our Oatham ancestry, but this is proving to be more difficult than I thought. In regards to George Richard Oatham and Adeline Emily Oatham, I do know there are a few Oathams in Wellington and the Lower Hutt areas of New Zealand which are not directly related to our family, as we are based mainly in the Waikato. They may have more knowledge of their ancestry which may help you out with your query.