I discovered this posting the day I opened the envelopes containing my grandfather's marriage certificate (as summarised by John Clifton-Bligh) and his death certificate. I have a copy of the birth certificate that was apparently found among his papers at his death. The story is considerably less grand than the marriage certificate suggests. In 1869, he was born Joseph Lamothe, the son of Charles Lamothe, superintendent of distilleries, and Marie Antoinette Martinet, his wife. Marie Antoinette's mother was called Josephine Amelie -which I assume is where "Charles Joseph" got the Amelia from. The "de Marigny" looks like a fabrication, as presumably was his own surname, which had acquired an aristocratic "de"by the time he was signing his marriage certificate in Rockhampton, Queensland, Australia. Investigators engaged by my father (Peter Delamothe) soon before his death in 1973 could find no trace of a birth of Joseph de la Mothe (in Mauritius or Paris at the relevant time) or Amelie Martine de Marigny, nor of their act of marriage. My grandfather's marriage certificate gave his birthplace as Paris, France; his death certificate gave it as Maurious, France. I don't think there is a Maurious in France; it looks to me that someone mistranscribed a handwritten Mauritius onto the death certificate. You could imagine a "ti" getting read as an "o". I *think* all the above speculation is correct, but we can never be sure. Still on the name trail, I'd like to find records of his departure from Mauritius and his arrival in Australia - his death certificate suggests that he was 19 when he arrived in Australia (which would make it around 1888). My guess is that he left Mauritius as a Lamothe and arrived in Australia as a more aristocratic de la Mothe. I'd like to be able to check ships' manifests for my hunch(but how?) Both his marriage and death certificates say he was a chemist. It would be interesting to know in what he qualified, where, and under what name.