Thank you in advance, David. My father stated that his uncles were known figures in France, Turkey, or Greece. I have tried Google search for philosopher, Leon Georgion/Georgiou (Turkey, Greece or France) et engineer/architect, Adonious Georgion/Georgiou, same countries in the 1890s-1930s? I have looked under publications and some engineering periodicals. No luck. Will you help me on this? Merci!