Hi Michelle,
Good to hear back from you.
Re... "I don't know how ou did it but thank you so much. "
Here is how I did it. Once, I had the full birth name of Thomas B. PINNEY (which is the name shown on his immigration to NZ), I was able to put that name into Trove, and solved the mystery. Trove search words:
"Thomas Bryant pinney"
Did you download his death certificate, from Vic BDM's?
Re... "I am also going to try and find out if Thomas and Ellen ever had children of their own as they were only 35 when going to NZ."
I checked NZ births previously, and did not find any births to them. Nil births in Australia found for them; but might be hard to check with the various ways of spelling PINNEY.
Mary