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.
Christianus Robidé van der Aa
Christianus Petrus Eliza Robidé van der Aa, born in Amsterdam October 7, 1791, was a son of Pierre Jean Baptiste Charles van der Aa and Francina Adriana Bartha van Peene. After his promotion to Doctor in both Laws on December 27, 1811, he settled in Leiden as a lawyer, in the office of his father. His father died on May 12, 1812, and on June 13, 1812, Christianus was appointed secretary to the mayor of Sneek, because of his fluency in French. On March 5, 1814, he became Secretary and schout of De Lemmer. Thereafter, he became secretary of Lemsterland. In the 1813 revolt against the Napoleonic rule, he was a Major, and during the 1815 war he joined the army as a volunteer.