Dorothea Marie of Saxe-Gotha-Altenburg
Dorothea Marie of Saxe- Gotha-Altenburg( 22 January 1674 – 18 April 1713) was the wife of Ernst Ludwig I, Duke of Saxe- Meiningen.
She was the daughter of Frederick I, Duke of Saxe- Gotha- Altenburg and his first wife, Magdalena Sybille of Saxe- Weissenfels.
She married Ernst Ludwig I on the 19 September 1704.
Jeanne de Laval (1549–1586)
Jeanne de Laval( 1549- 1586), was a French noble.
She was the mistress to Henry III of France.
She was a lady- in- waiting to the queen, Louise of Lorraine.
Karl Friedrich, Duke of Saxe-Meiningen
Karl Friedrich, Duke of Saxe- Meiningen( Meiningen, 18 July 1712 – Meiningen, 28 March 1743), was a duke of Saxe- Meiningen.
He was the fourth but third surviving son of Ernst Ludwig I, Duke of Saxe- Meiningen and his first wife, Dorothea Marie of Saxe- Gotha- Altenburg.
Karl Friedrich inherited the duchy of Saxe- Meiningen when his father died in 1724, along with his older brother, Ernst Ludwig II, under the guardianship of his uncles Frederick Wilhelm and Anton Ulrich until 1733.
When his older brother died unmarried in 1729, Karl Frederick ruled alone until his death.
Like his brother, he never married, and, after his death, was succeeded by his uncle, Friedrich Wilhelm.
Ernst Ludwig I, Duke of Saxe-Meiningen
Ernst Ludwig I, Duke of Saxe- Meiningen
( 7 October 1672 – 24 November 1724) was a German( Saxon) nobleman.
Ernst Ludwig II, Duke of Saxe-Meiningen
Ernst Ludwig II, Duke of Saxe- Meiningen( Coburg, 8 August 1709 – Meiningen, 24 February 1729), was a duke of Saxe- Meiningen.
He was the third but second surviving son of Ernst Ludwig I, Duke of Saxe- Meiningen and his first wife, Dorothea Marie of Saxe- Gotha.
The death of his older brother Josef Bernhard( 22 March 1724) made him the heir to the duchy of Saxe- Meiningen.
When his father died seven months later( 24 November 1724), Ernst Ludwig- fifteen years old- inherited the duchy along with his younger brother Karl Frederick.
Because the two princes were under age when their father died, their uncles Frederik Wilhelm and Anton Ulrich served as their guardians until 1733.
Ernst Ludwig died after reigning five years, only twenty years old and unmarried.
He was succeeded by his younger brother, Karl Frederick.
Princess Luise Dorothea of Saxe-Meiningen
Luise Dorothea of Saxe- Meiningen( 10 August 1710 – 22 October 1767) was a member of German royalty.
She was born in Meiningen, the daughter of Ernst Ludwig I, Duke of Saxe- Meiningen and Dorothea Marie of Saxe- Gotha.
She was the wife of Frederick III, Duke of Saxe- Gotha- Altenburg.
Princess Louise Eleonore of Hohenlohe-Langenburg
Princess Luise Eleonore of Hohenlohe- Langenburg( 11 August 1763, in Langenburg – 30 April 1837, in Meiningen) was a German regent.
She was duchess of Saxe- Meiningen by marriage to George I, Duke of Saxe- Meiningen, and Regent of Saxe- Meiningen during the minority of her son from 1803 to 1821.
Bernhard III, Duke of Saxe-Meiningen
Bernhard III, Duke of Saxe- Meiningen( 1 April 1851 – 16 January 1928), was the last reigning duke of Saxe- Meiningen.
Princess Charlotte of Saxe-Meiningen
Princess Charlotte of Saxe- Meiningen( 11 September 1751, Frankfurt am Main, Free Imperial City of Frankfurt, Holy Roman Empire – 25 April 1827, Genoa, Kingdom of Sardinia) was a member of the House of Saxe- Meiningen and a Princess of Saxe- Meiningen by birth and a member of the House of Saxe- Gotha- Altenburg and Duchess consort of Saxe- Gotha- Altenburg through her marriage to Ernest II, Duke of Saxe- Gotha- Altenburg.
Princess Augusta of Saxe-Meiningen
Princess Augusta Louise Adelaide Caroline Ida of Saxe-Meiningen (6 August 1843 – 11 November 1919) was the daughter of Bernhard II, Duke of Saxe-Meiningen and his wife Princess Marie Frederica of Hesse-Kassel.
She was the mother of Ernst II, Duke of Saxe-Altenburg.

Question: Were Ernst Ludwig I, Duke Of Saxe-Meiningen and Jeanne De Laval (1549–1586) of the same nationality?
Answer: no