Which realm was passed onto this duke whose father passed away before his birth and whose history was documented in the memoirs of Helene Kottanner?
Helene Kottanner Helene Kottanner (née Wolfram; Hungarian: "Kottaner Ilona" ; c. 1400 – after 1470) was a Hungarian courtier and writer. Her last name is spelled variously as Kottanner, Kottanerin, or Kottannerin. She is primarily known to history as the author of memoirs about the years 1439 and 1440, when king Albert II of Germany died and his son Ladislaus the Posthumous was born. Kottanner, who dictated her life story in German, was a kammerfrau to Queen Elizabeth of Luxembourg (1409–1442). She also assisted Queen Elisabeth in a royal succession plot.
Ernest I, Duke of Saxe-Coburg and Gotha Ernest I (German: "Ernst Anton Karl Ludwig Herzog" ; 2 January 1784 – 29 January 1844) was the last sovereign duke of Saxe-Coburg-Saalfeld (as Ernest III) and, from 1826, the first sovereign duke of Saxe-Coburg and Gotha (as Ernest I). He was the father of Albert, Prince Consort of Queen Victoria and is thus a patrilineal ancestor and great-great-great-grandfather of Queen Elizabeth II. Ernest fought against Napoleon Bonaparte and through construction projects and the establishment of a court theatre left a strong imprint on his residence town, Coburg.