Kelly Rondestvedt
Kelly, Hereditary Princess of Saxe- Coburg and Gotha, Duchess of Saxony( born Kelly Jeanne Rondestvedt on 10 January 1975) is an American investment banker.
Through her marriage to Hubertus, Hereditary Prince of Saxe- Coburg and Gotha, the heir apparent to the defunct ducal throne of Saxe- Coburg and Gotha, she is a princess of the House of Saxe- Coburg and Gotha.
Prince Philipp of Saxe-Coburg and Gotha
Ferdinand Philipp Maria August Raphael of Saxe-Coburg and Gotha (28 March 1844 – 3 July 1921) was the second prince of Saxe-Coburg and Gotha and lord of Csábrág and , both in modern-day Slovakia.
Princess Dorothea of Saxe-Coburg and Gotha
Princess Dorothea Maria Henriette Auguste Louise of Saxe-Coburg and Gotha (30 April 1881 – 21 January 1967) was a princess of Saxe-Coburg and Gotha  by birth and the duchess of Schleswig-Holstein  through her marriage to Ernst Gunther, duke of Schleswig-Holstein.
Dorothea was born in Vienna, Austria, the second child and only daughter of Prince Philipp of Saxe-Coburg and Gotha and Princess Louise of Belgium.
Alfred, Duke of Saxe-Coburg and Gotha
Alfred( Alfred Ernest Albert; 6 August 184430 July 1900) reigned as Duke of Saxe- Coburg and Gotha from 1893 to 1900.
He was the second son and fourth child of Queen Victoria of the United Kingdom and Prince Albert of Saxe- Coburg and Gotha.
He was known as the Duke of Edinburgh from 1866 until he succeeded his paternal uncle Ernest II as the reigning Duke of Saxe- Coburg and Gotha in the German Empire.
Andreas, Prince of Saxe-Coburg and Gotha
Andreas, Prince of Saxe- Coburg and Gotha, Duke of Saxony( given names:" Andreas Michael Friedrich Hans Armin Siegfried Hubertus"; born 21 March 1943) has been the head of the House of Saxe- Coburg and Gotha since 1998.
He is the grandson of Charles Edward, the last ruling duke of Saxe- Coburg and Gotha.
Friedrich Josias, Prince of Saxe-Coburg and Gotha
Friedrich Josias, Prince of Saxe-Coburg and Gotha (Friedrich Josias Carl Eduard Ernst Kyrill Harald; 29 November 1918 – 23 January 1998) was the head of the Ducal Family of Saxe-Coburg and Gotha and titular Duke of Saxe-Coburg and Gotha from 1954 until his death.
Prince August Leopold of Saxe-Coburg and Gotha
Prince August Leopold of Saxe- Coburg and Gotha( December 6, 1867 – October 11, 1922), known in Brazil as Dom Augusto Leopoldo, was a prince of the Empire of Brazil and of the House of Saxe- Coburg and Gotha- Koháry.
He was the second of four sons born to German Prince Ludwig August of Saxe- Coburg and Gotha and Princess Leopoldina of Brazil.
The second grandson of the Emperor Pedro II, the prince was, for some years between the presumptive heirs to the Imperial Crown of Brazil.
Their descendants would form the Saxe- Coburg and Gotha branch of the Imperial House of Brazil.
Charles Edward, Duke of Saxe-Coburg and Gotha
Charles Edward (baptised Leopold Charles Edward George Albert, ; 19 July 1884 – 6 March 1954) was the last reigning duke of Saxe-Coburg and Gotha from 30 July 1900 until 1918.
A male-line grandson of Queen Victoria and Prince Albert
, he was also until 1919 a Prince of the United Kingdom and from birth held the British titles of Duke of Albany, Earl of Clarence and Baron Arklow.
Charles Edward was a controversial figure in the United Kingdom due to his status as the sovereign Duke of Saxe-Coburg and Gotha, which was part of the German Empire, during World War I. On 14 November 1918, however, after a revolution in Germany, he was forced to abdicate as Duke of Saxe-Coburg and Gotha and lost his rights to the ducal throne.
In 1919, Charles Edward was deprived of his British peerages, his title of Prince and "Royal Highness" and his British honours for having fought in the German Army (eventually as a General) during WWI; he was labelled a "traitor peer".
Charles Edward later joined the Nazi Party as well as the Sturmabteilung (SA, or Brownshirts), where he reached the position of Obergruppenführer.
Charles Edward served in a number of positions in Nazi Germany in the 1930s and 1940s, including President of the German Red Cross from 1933–45.
He was the maternal grandfather of King Carl XVI Gustaf of Sweden and the younger brother of Princess Alice, Countess of Athlone.
After paying the fines imposed by the denazification court and losing properties to the Soviet army, he died in poverty in 1954.
Princess Teresa Cristina of Saxe-Coburg and Gotha
Princess Teresa Cristina of Saxe- Coburg and Gotha( 23 August 1902 – 24 January 1990), was a German princess of the House of Saxe- Coburg and Gotha.
Hubertus, Hereditary Prince of Saxe-Coburg and Gotha
Hubertus Michael, Hereditary Prince of Saxe- Coburg and Gotha, Duke of Saxony( born 16 September 1975) is the heir- apparent of the head of the family which ruled the Duchy of Saxe- Coburg and Gotha until 1918.

Question: What nationality is Friedrich Josias, Prince Of Saxe-Coburg And Gotha's father?