Princess Ernestine of Saxe-Weimar-Eisenach
| Princess Ernestine | |||||
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18th-century portrait | |||||
| Duchess consort of Saxe-Hildburghausen | |||||
| Tenure | 1 July 1758 – 23 September 1780 | ||||
| Born | 4 January 1740 Weimar | ||||
| Died | 10 June 1786 (aged 46) Hildburghausen | ||||
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| Father | Ernest Augustus I, Duke of Saxe-Weimar-Eisenach | ||||
| Mother | Margravine Sophie Charlotte of Brandenburg-Bayreuth | ||||
| Religion | Lutheranism | ||||
Princess Ernestine Auguste Sophie of Saxe-Weimar-Eisenach (4 January 1740, in Weimar – 10 June 1786, in Hildburghausen) was a princess of Saxe-Weimar-Eisenach and by marriage Duchess of Saxe-Hildburghausen.