 | You can help expand this article with text translated from the corresponding article in German. (September 2012) Click [show] for important translation instructions.
|
 | This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (November 2018) |
| John Ernest IV | |
|---|---|
 | |
| Duke of Saxe-Coburg-Saalfeld | |
| Reign | 6 August 1699 – 17 February 1729 |
| Successor | Christian Ernest |
| Duke of Saxe-Saalfeld | |
| Reign | 26 March 1675 – 17 February 1729 |
| Predecessor | New creation |
| Duke of Saxe-Coburg | |
| Reign | 6 August 1699 – 17 February 1729 |
| Predecessor | Albert V |
| Born | 22 August 1658 Gotha, Saxe-Gotha, Holy Roman Empire |
| Died | 17 February 1729 (aged 70) Saalfeld, Saxe-Coburg-Saalfeld, Holy Roman Empire |
| Spouse | Sophie Hedwig of Saxe-Merseburg Charlotte Johanna of Waldeck-Wildungen |
| Issue | Princess Christiane Sophie Christian Ernest Princess Charlotte Wilhelmine Prince Wilhelm Frederick Prince Karl Ernst Princess Sophia Wilhelmina Princess Henriette Albertine Princess Louise Emilie Princess Charlotte Francis Josias Princess Henriette Albertine |
| House | Wettin |
| Father | Ernest I, Duke of Saxe-Gotha |
| Mother | Elisabeth Sophie of Saxe-Altenburg |
| Religion | Lutheran |
John Ernest IV (German: Johann Ernst; 22 August 1658 in Gotha – 17 February 1729 in Saalfeld) was a reigning duke of Saxe-Coburg-Saalfeld.