Ernst Johann von Biron
| Ernst Johann von Biron | |
|---|---|
| Duke of Courland and Semigallia | |
Portrait, c. 1730 | |
| Duke of Courland and Semigallia | |
| Reign | 1737–1740 |
| Predecessor | Ferdinand |
| Successor | Council of the Duke |
| Reign | 1763–1769 |
| Predecessor | Charles |
| Successor | Peter |
| Regent of Russia | |
| Regency | 28 October – 20 November 1740 |
| Monarch | Ivan VI |
| Successor | Anna Leopoldovna |
| Born | 23 November 1690 Kalnzeem, Semigallia, Courland and Semigallia |
| Died | 29 December 1772 (aged 82) Mitau, Courland and Semigallia |
| Burial | Ducal crypt in the Jelgava Palace |
| Spouse | |
| Issue |
|
| House | Biron |
| Father | Karl von Bühren |
| Mother | Catharina Hedwig von Raab gt Thülen |
| Religion | Lutheranism |
Ernst Johann von Biron (German: Ernst Johann von Biron; Russian: Эрнст Иоганн Бирон; 23 November [O.S. 13 November] 1690 – 29 December [O.S. 18 December] 1772) was the duke of Courland and Semigallia from 1737 to 1740 and again from 1763 to 1769. He was also briefly the regent of the Russian Empire in 1740.