Augustus Frederick was baptised in the Great Council Chamber at St James's Palace, on 25 February 1773, by Archbishop of Canterbury Frederick Cornwallis.His godparents were the Duke of Saxe-Gotha-Altenburg (his paternal first cousin once-removed, for whom The Earl of Hertford, Lord Chamberlain, stood proxy), Duke George Augustus of Mecklenburg (his maternal uncle, for whom the Earl of Bristol ...
Augustus served his brother as a general in the War of the Austrian Succession and distinguished himself in the Battle of Hohenfriedberg. But in the Seven Years' War , owing to the fatal retreat of Zittau during the Battle of Kolin in 1757, he incurred the wrath of his brother the King, and withdrew from the army.
On 27 February 1764, when Prince Frederick was six months old, he became Prince-Bishop of Osnabrück upon the death of Clemens August of Bavaria. The Peace of Westphalia stipulated that the city of Osnabrück would alternate between Catholic and Protestant rulers, with the Protestant bishops to be elected from the cadets of the House of Brunswick-Lüneburg . 
Ernest Augustus was himself an heir to the British titles of Prince of Great Britain and Ireland, recognised ad personam for Ernst August's father as well as for him and his siblings by King George V of the United Kingdom on 17 June 1914, Duke of Cumberland and Teviotdale, Earl of Armagh, which however were all suspended under the Titles Deprivation Act 1917.
Prince Ernst August of Hanover (German: Ernst August Albert Paul Otto Rupprecht Oskar Berthold Friedrich-Ferdinand Christian-Ludwig Prinz von Hannover Herzog zu Braunschweig und Lüneburg Königlicher Prinz von Großbritannien und Irland; born 26 February 1954) is the head of the royal House of Hanover, members of which reigned in the United Kingdom of Great Britain and Ireland until 1901, the ...
Prince Ernest Augustus of Hanover, Duke of Brunswick-Lüneburg, Prince of Great Britain and Ireland, was born at Hanover during the reign of his paternal grandfather, Ernest Augustus, King of Hanover. He became the crown prince of Hanover upon his father's accession as George V in November 1851.
Augustus at first was deceived. Spurred on by his wife the matter reached a climax in 1574, when letters were discovered, which, while revealing a hope to bring over Augustus to Calvinism, cast some aspersions upon the elector and his wife. Augustus ordered the leaders of the Crypto-Calvinists to be seized, and they were tortured and imprisoned.