Hi, I might be able to help as we are related to the family listed above in the 1851 census (Morgan and Margaret). We descend from David who settled in Victoria Australia along with two of his brothers. Their sister Charlotte settled in America. David's son Owen Vivien Davies became a dentist and settled in Dunedin NZ. David's brother Morgan did marry in New Zealand, our records say this was 1872 though, he married Elizabeth Joseph in Hokitika. They then though moved to Victoria. It is possible some of their children settled back in NZlike their cousins. Does any of this connect to the names you have?