Family grave Keilhack at <a href="//commons.wikimedia.org/wiki/Friedhof_Frohnau" title="Friedhof Frohnau">Friedhof Frohnau</a>, <a href="//commons.wikimedia.org/wiki/Berlin-Frohnau" title="Berlin-Frohnau">Berlin-Frohnau</a>, remebering Hans Keilhack, died at <a href="https://de.wikipedia.org/wiki/Speziallager_Ketschendorf" class="extiw" title="de:Speziallager Ketschendorf">de:Speziallager Ketschendorf</a>, 1946. H. Keilhack was one of 18 survivors of <a href="//commons.wikimedia.org/w/index.php?title=S.M.S_%22Leipzig%22&amp;action=edit&amp;redlink=1" class="new" title='S.M.S "Leipzig" (page does not exist)'>S.M.S "Leipzig"</a>, sunk in the battle of the Falkland Islands, 8th of December  1914. His father was Konrad Keilhack, a famous geologist.
<a href="//commons.wikimedia.org/wiki/User:Mutter_Erde" title="User:Mutter Erde">Mutter Erde</a>
Attribution
<span class="int-own-work" lang="en">Own work</span>