John Frederick of Schleswig-Holstein-Gottorp (born 1 September 1579 in Gottorp, a part of today's Schleswig; died 3 September 1634 in Altkloster, a part of today's Buxtehude) was the Lutheran Administrator of the Prince-Archbishopric of Bremen, the Prince-Bishopric of Lübeck and the Prince-Bishopric of Verden.
Author: Unknown artist; without any doubt dead for far more than 70 years Source: Ernst-Günther Prühs, Geschichte der Stadt Eutin. Struve's Verlag, 1994 License: CC-PD-Mark PD Old