Duke Johann of Oldenburg

(1940-2025) (1940–2025)

Parents

• Nikolaus, Hereditary Grand Duke of Oldenburg
• Princess Helene of Waldeck and Pyrmont

Children

• Eilika Duchess of Oldenburg
• Tatiana von Holstein-Gottorp, Herzogin von Oldenburg
• Constantin Nikolaus von Holstein-Gottorp, Herzog von Oldenburg

Siblings

• Huno Herzog von Oldenburg
• Duchess Altburg of Oldenburg
• Duke Egilmar of Oldenburg
• Duke Peter of Oldenburg
• Duchess Rixa of Oldenburg
• Anton-Günther, Duke of Oldenburg
• Duke Friedrich August of Oldenburg
• Duchess Eilika of Oldenburg

Partners

• Ilka Gräfin zu Ortenburg