Don't you just love those name changes, or transcription errors.
Presently I've been following up the descendants of Anna Thornthwaite's brother, James Craven Thornthwaite (b1863 d1920). His daughter, Clara Thornthwaite was buried in Lockhart (found in Lockhart General Cemetery index, also in NSW BDM). That's handy to me as I live in the Lockhart District. Clara Thornthwaite married in 1926 to Norman Donald McKenzie (MacKenzie, Mc Kenzie). I have no certificates for these.
I'm going through my loose paperwork presently, I'm sure I have that certificate somewhere, for Percy and Adelaide (thanks to a descendent of their's who is also doing the family genealogy). Have you come across Norma Campbell or Pat Meredith (both avid genealogists in the family) during your research? I can send you info about the descendants of Percy Delaney and Adelaide Power. And of their ancestors if required. Both have roots that go back to the first fleet and convicts.
Use my yahoo email address to send to. I'll reply to your email via another email address I use.
Thank you for the info you've given me in your message - that will come in useful.