I believe we may be related, at least by the marriage of my grandparents.
My mother is Julie Louise Lackner.
Her father (adoptive) was Herbert William Anton Lackner. Herbert's father was Frederick John (Johan) Anton (Von) Lackner born 1881 in Muhldorf. Married to Edith Lilian Bunny.
Herbert along with most of his brothers & sisters and also, me, were all born in Akaroa, NZ.
By grandmother, Norma Phyillis Lackner nee Smith was married to Herbert. She had mentioned a Chris Lackner (I guessing that's you) to me several times.
I have found 3 Brothers & 3 Sisters of Herbert.I’m guessing maybe one of them is your mother or father. They are Lawrence E Lackner, Lucia E M Lackner, Gerald S F Lackner, Mary E L Lackner, Hazel Rita Lackner & Robert D Lackner.
Please let me know if you would like to get in contact. My email address is firstname.lastname@example.org