Most likely Frank's correct name would have been Franz, Franks, Ferndinand or even Friedrich. But I checked for all deaths of these names and Frank and Francis with any surname in 1919 and 1920 and there is nothing that looks like Von Thiele. Did he marry Eva Maddox in Sydney in 1908 , and did they have the children ? : Francis L , 1909, Woonona Bertha , 1910, Balmain South (died same year) Ronald S , 1911, Balmain South. How sure are you of the December 1919 death ?