I was reading the boards when i found your reply.
I am also descended from Andrew
Thomas had another son Andreas 14 July 1829.
He had two children as well.
i am not sure where they ended up.
I am still putting together my family tree.
I have a few family trees one from the 1864-1964 reunion in Ohaupo and one from 1982 reunion in Ohaupo (which I went to)
I am happy to share what I have - also keen to get copies of any birth certs.
Unfortunately my Grandmother Marjorie Karl nee Kemp had done a lot of research but after her death no one knows where the info went...firstname.lastname@example.org
The above is the best email to get me on.