The marriage certificate is for St John's Church in Napier, New Zealand, and it says that Thomas Moody is a labourer. I know from relatives still alive who knew him, that he worked on the railways, and the family moved about a lot through the central North Island of New Zealand at that time (although they later settled in Christchurch). However the family went through a messy legal separation of Mary Ann and Thomas, where he was essentially disowned by them all - by all accounts he was not a pleasant man.
No parents are given on the certificate at that time, but the witnesses are Frederick Starmer and Mary Ann Lincoln, names that mean nothing to me. Interestingly the minister officiating John Townsend, was fired later that year, causing a large church scandal (seems his views were out of step with the congregation). So the marriage certificate is not that helpful. I will order the photocopy of the original, as this is a written copy, so may be missing information.
The family is a large one, but all the children are born to Thomas and Mary Ann Moody, except Mary Elizabeth and Thomas Henry, who are born to Thomas Mark Moody. No idea why this would change and I don't have original copies of any of these. Maybe it is time to order a few (expensive in NZ!!).
The family list I have given earlier is watertight (well there is another Frederick Charles, replacing the earlier one who died in infancy), and it comes from Mary Ann Tomlyn's family bible, where she has written them all down plus their birthdays. That is where Thomas Mark Moody's birthday of April 1 1855 comes from as well.