Ernest Gunther of Schleswig-Holstein-Sonderburg-Augustenburg (14 October 1609 – 18 January 1689) was a Duke of Schleswig-Holstein of its Sonderborg line. He was the first who had his ducal seat in the new castle of Augustenborg, and his rule was from 1647 until his death.
He was third son of Alexander, Duke of Schleswig-Holstein-Sonderburg and his wife Countess Dorothea of Schwarzburg-Sondershausen.
On 15 June 1651 he married Auguste of Schleswig...
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Date of birth:
- Oct 14, 1609
Date of death:
- Jan 18, 1689 (age 79 years)
