Ernst Bogislaw von Croÿ (26 August 1620, in Finstingen (Fénétrange) – 7 February 1684, in Königsberg[1][2]) was a Lutheran Administrator of the Prince-Bishopric of Cammin and official in the service of Brandenburg-Prussia.
Although the House of Croÿ was Roman Catholic, his parents marriage contract called for a Protestant education for their children.
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.
Hostile to her husband's family, Anna fled with Ernst Bogislaw to Stettin (Szczecin), the capital of the Duchy of Pomerania.
After his death in Königsberg in Prussia, Ernst Bogislaw was buried next to his mother in the palace church of Stolp (Słupsk).