A few weeks after Ernst Bogislaw was born , his father fell ill .
A few weeks after Ernst Bogislaw was born , his father died on 7 October 1620 near Oppenheim while campaigning during the Thirty Years ' War for Ferdinand II , Holy Roman Emperor .
A few weeks after Ernst Bogislaw was born , his father fell ill and died on 7 October 1620 near Oppenheim while campaigning during the Thirty Years ' War for Ferdinand II , Holy Roman Emperor .