John William III
| John William III | |
|---|---|
| Duke of Saxe-Eisenach | |
| Reign | 1698–1729 |
| Predecessor | John George II |
| Successor | Wilhelm Heinrich |
| Born | 17 October 1666 Friedewald |
| Died | 14 January 1729 (aged 62) Eisenach |
| Spouse | Amalie of Nassau-Dietz Christine Juliane of Baden-Durlach Magdalene Sibylle of Saxe-Weissenfels Marie Christine Felizitas of Leiningen-Dagsburg-Falkenburg-Heidesheim |
| Issue | Wilhelm Heinrich Johannette, Duchess of Saxe-Weissenfels Karoline, Landgravine of Hesse-Philippsthal Princess Charlotte Wilhelmine Christiane, Princess of Nassau-Usingen |
| House | House of Wettin |
| Father | John George I, Duke of Saxe-Eisenach |
| Mother | Johannetta of Sayn-Wittgenstein |
| Religion | Lutheranism |
John William III, Duke of Saxe-Eisenach (17 October 1666 – 14 January 1729), was a duke of Saxe-Eisenach, and came from the Ernestine line of the House of Wettin.