Ernest Augustus
Ernest Augustus or Ernst August may refer to:
Royalty
House of Hanover
- Ernest Augustus, Elector of Hanover, father of King George I of Great Britain
- Ernest Augustus, [Duke of York and Albany], Prince-Bishop of Osnabrück, son of the previous
- Ernest Augustus, [King of Hanover], son of King George III of the United Kingdom
- Ernest Augustus, Crown Prince of Hanover,, son of George V of Hanover
- Ernest Augustus, Duke of Brunswick, son of the previous
- Prince Ernest Augustus of Hanover (born 1914), son of the previous
- Prince Ernst August von Hannover (born 1954), son of the previous
- Prince Ernst August of Hanover (born 1983), son of previous
House of Wettin
- Ernest [Augustus I, Duke of Saxe-Weimar-Eisenach]
- Ernest [Augustus II, Duke of Saxe-Weimar-Eisenach], son of the previous
Other
- Ernst August (ship), a ship named after Ernest Augustus, King of Hanover