https://mappingthelives.org/bio/511cabb4-8802-4a4a-9126-353e1dfb9620?language=en
his son, Erich
https://spurenimvest.de/2021/11/19/mayer-erich/
Hugo Mayer (1890 - 1954) - Genealogy
#theresienstadt https://www.pamatnik-terezin.cz/prisoner/te-mayer-hugo
https://spurenimvest.de/2023/12/30/mayer-hugo/