Johann Ernst I, Duke o Saxe-Weimar
Johann Ernst I, Duke o Saxe-Weimar (21 Februar 1594 – 6 December 1626), wis a duke o Saxe-Weimar.
| Johann Ernst I | |
|---|---|
 | |
| Duke o Saxe-Weimar | |
| Ring | 1605–1620 |
| Predecessor | Johann |
| Successor | Wilhelm |
| Born | 21 Februar 1594 Altenburg |
| Dee'd | 6 December 1626 (aged 32) Sankt Martin, Hungary |
| Hoose | Hoose o Wettin |
| Faither | Johann, Duke o Saxe-Weimar |
| Mither | Dorothea Maria o Anhalt |
| Releegion | Lutheran |