Christian von Ehrenfels
Christian von Ehrenfels was born on 20 June 1859 in Rodaun near Vienna and grew up at his father's castle Brunn am Walde in Lower Austria. He joined secondary school in Krems and first studied at the Hochschule für Bodenkultur in Vienna and then changed to the Universität Wien.
Christian Lindner
Christian Lindner was born in Wuppertal, Germany. His father Wolfgang Lindner is a teacher of mathematics and computer science at the "Städtisches Gymnasium" in Wermelskirchen.