Ernest, Duke of Saxe-Hildburghausen
Ernest, Duke of Saxe-Hildburghausen (12 June 1655 in Gotha – 17 October 1715 in Hildburghausen) was a duke of Saxe-Hildburghausen.
He was the ninth but sixth surviving son of Ernest I, Duke of Saxe-Gotha and Elisabeth Sophie of Saxe-Altenburg.
When his father died in 1675, Ernest and his six brothers jointly assumed the government of the duchy; five years later, in 1680, and under the treaty of division of the family lands, he received the towns of Hildburghausen, Eisfeld, Heldburg, Königsberg.
Ernest became thereby founder and first duke of Saxe-Hildburghausen.
After the death of his brothers Heinrich and Albrecht without male descendants, he took the towns of Sonnefeld and Behringen.
Ernest settled his official residence in Hildburghausen and began the building of his castle.
In 1710 he approved the building in his lands of a new city of French Huguenot families, who were driven out after the Edict of Nantes from France.
As Master of Cavalry he fought in 1683 in the Battle of Vienna, and 1685 in the conquest of Gran and Neuhaeusel, after this he entered the Dutch States Army as a Colonel with the conquest of Kaiserswerth.
In the building of his new residence, Ernest acquired a serious indebtedness of the principality to his brothers, which could not be reduced even by ever larger taxations.
Frederick, Duke of Saxe-Altenburg
Frederick, Duke of Saxe- Hildburghausen( 29 April 1763 in Hildburghausen – 29 September 1834 in Jagdhaus Hummelshain, Altenburg), was duke of Saxe- Hildburghausen( 1780 – 1826) and duke of Saxe- Altenburg( 1826–1834).
Prince Eugene of Saxe-Hildburghausen
Frederick William Eugene of Saxe- Hildburghausen( born: 8 October 1730 in Hildburghausen; died: 4 December 1795 in Öhringen) was a Prince of Saxe- Hildburghausen.
Ernest Frederick I, Duke of Saxe-Hildburghausen
Ernest Frederick I, Duke of Saxe-Hildburghausen (21 August 1681 in Gotha – 9 March 1724 in Hildburghausen), was a duke of Saxe-Hildburghausen.
He was the eldest son of Ernest, Duke of Saxe-Hildburghausen and Countess Sophie Henriette of Waldeck.
During his youth he served on the Netherlands in the imperial military army, during which he was wounded in the Spanish Succession War at Höchstädt; in 1715 he left the Army after the death of his father, and assumed the government of the duchy of Saxe-Hildburghausen.
He wanted, like many German princes, to repeat the splendor of the court of the King Louis XIV of France in his own duchy; but this was the cause of his financial ruin.
Constantly in need of money, he levied taxes and sold towns.
Among them was the county of Cuylenburg, the dowry of his wife.
The county was sold in 1720 to the General States, not for the repayment of the debts but to build in his palace a garden connected with a channel.
Likewise, in 1723 the office was finally sold to the duchy of Saxe-Meiningen.
But the sale, without the assent of his wife was illegal, and this led to a war with Saxe-Meiningen.
The county was occupied with troops of both duchies and at the end of the war all of the county was devastated and ruined.
Because of his intolerable fiscal charges, in 1717 an open revolt developed in the duchy.
Ernest Frederick III, Duke of Saxe-Hildburghausen
Ernst Frederick III Karl, Duke of Saxe-Hildburghausen (10 June 1727 in Königsberg in Bayern – 23 September 1780 in Seidingstadt), was a duke of Saxe-Hildburghausen.
Ernest Frederick II, Duke of Saxe-Hildburghausen
Ernst Frederick II, Duke of Saxe- Hildburghausen( 17 December 1707 in Hildburghausen – 13 August 1745 in Hildburghausen), was a duke of Saxe- Hildburghausen.
Princess Louise of Denmark (1726–1756)
Louise of Denmark and Norway( 19 October 1726 – 8 August 1756) was a Danish and Norwegian princess, the daughter of King Christian VI of Denmark and his wife Sophie Magdalene of Brandenburg- Kulmbach.
Following her marriage to Ernest Frederick III, Duke of Saxe- Hildburghausen, she became Duchess of Saxe- Hildburghausen.
Louis Frederick of Saxe-Hildburghausen
Louis Frederick of Saxe- Hildburghausen( 11 September 1710, Hildburghausen – 10 June 1759, Nijmegen), was a Prince of Saxe- Hildburghausen and General Field Marshal in the Bavarian army.
Duchess Charlotte Georgine of Mecklenburg-Strelitz
Duchess Charlotte Georgine Luise Friederike of Mecklenburg- Strelitz( 17 November 1769 – 14 May 1818) was a member of the House of Mecklenburg- Strelitz and a Duchess of Mecklenburg- Strelitz by birth and a Duchess of Saxe- Hildburghausen through her marriage to Frederick, Duke of Saxe- Hildburghausen( later Duke of Saxe- Altenburg).
Ernest Frederick, Duke of Saxe-Coburg-Saalfeld
Ernest Frederick, Duke of Saxe- Coburg- Saalfeld( 8 March 1724 in Saalfeld – 8 September 1800 in Coburg), was a Duke of Saxe- Coburg- Saalfeld.

Question: Who is Ernest Frederick I, Duke Of Saxe-Hildburghausen's paternal grandfather?