https://en.wikipedia.org/wiki/German_Australians
After the Second World War, Australia received a large influx of ethnic German displaced persons who were a significant proportion of Australia's post war immigrants. A number of German scientists were recruited soon after the War through the ESTEA scheme some of them coming by migrant ships such as the Partizanka.[11][12] In the 1950s and 1960s, German immigration continued under assisted migration programs promoted by the Australian Government. By July 2000, Germany was the fifth most common birthplace for settler arrivals in Australia after United Kingdom, Ireland, Italy and New Zealand.[4] By 1991, there were 112,000 German-born persons in Australia.
Partizanka:
11. Homeyer, Uta v. (1994). "The Employment of Scientific and Technical Enemy Aliens (Estea) Scheme in Australia: A Reparation for World War Ii?". Prometheus. 12: 77–93. doi:10.1080/08109029408629379.
12. Muenstermann, Ingrid (30 May 2015). Some Personal Stories of German Immigration to Australia since 1945. Xlibris Corporation. ISBN 9781503503137.[self-published source]
Josef Landherr - Danube-Swabians (area of Unified Germany) - That could be him... Landherr he felt was too Germanic, and he told me he changed it to Landthorpe (or similar)
Google; "Josef Landherr" messerschmitt
This is turning up results.
My OLD computer is running out of capacity at the moment... so the PDF's are taking ages to download and open....
[PDF]
Türkheimer Heimatblätter
https://kreativ-design-wg.de/th-hb/.../heft_95_2016.pdf
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Aug 1, 2016 - Rechner: Josef Landherr. 27.10.1933: Generalversammlung des .... Staffel des JG 3 Udet eine Messerschmitt Bf 109 G-6 ein. Infolge eines*...