Kammala jumla mai zuwa: An haifi Ernst August Hagen a Königsberg, a wancan lokacin babban birnin gudanarwa na Gabashin Prussia (kuma kusan kusan shekaru goma bayan
1806 lokacin da sarki ya tsere daga Berlin, gidan kotun Prussian). Mahaifinsa, Karl Gottfried Hagen (1749-1829) sanannen masanin kimiyyar sunadarai ne kuma masanin likitancin kotu.