Rubuta ci gaba don wannan sakin layi - 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 gudu daga Berlin, gidan gidan Prussian Court). Mahaifinsa, Karl Gottfried Hagen (1749-1829) sanannen masanin kimiyyar sunadarai ne kuma masanin likitancin kotu.