Thanks for the reply.
The Lombard's were a European family that moved to NZ, and then moved to Tonga for a number of years (I think he was on the run from the NZ Customs officials :) ), before moving back to NZ. I have checked through the NZ BDM historical site and past papers, and apart from things related to the above there isn't much else until the girls that I know of got married. I was hoping to track down their birth dates and find out if they had any other siblings.
I haven't heard of trove, will have to have a look.