Johann Rolf Rodenburg -vulgo Orthmann - was born in 1704 in Bohnhorst, Nienburg, Niedersachsen, Germany; died on 16 Feb 1758 in Diepenau, Nienburg, Niedersachsen, Germany.
Christian Ernst Orthmann was born on 4 Dec 1736 in Diepenau, Nienburg, Niedersachsen, Germany; died on 10 Sep 1834 in Diepenau, Nienburg, Niedersachsen, Germany; was buried on 13 Jul 1804 in Lavelsloh, Nienburg, Niedersachsen, Germany.