Hi, My name is Johan Otto Tiedemann - oldest son of Wolfgang Otto Tiedemann from Berlin born in 1926. He was son of Herbert Otto Tiedemann and Maj Tiedemann, born Essen-Möller. Grandfather was born in Baku in Russia in 1894 and died in Stockholm in 1985. Anyone reckognise this part of the Tiedemann family? Please get in touch!