Kaspar Hauser

Even now, the mystery surrounding Kaspar Hauser's infamous appearance at Nuremberg in 1828 is unresolved. The bewildered small boy claimed to have lived his entire life alone in a cellar, subsisting solely on bread and water, and sharing it with a toy horse. Hauser handed two letters to the Nurembergers who discovered him despite the fact that he did not speak German. One was from the laborer who provided for him, and the other was from his mother, who explained that his father had been killed in the cavalry and gave his name and birthdate. However, concerns about the boy persisted.

After being successively adopted by a teacher and the 4th Earl of Stanhope, Hauser grew up and was given a position as an office clerk. And if not for his tragic passing at the age of 21 after being stabbed, we might not have known anything about him. It's unclear whether this was a suicide or murder. In either case, it eternally obscured his lineage and his destiny. Since then, other theories have been put out, including the one that he was the hereditary Prince of Baden, a claim that DNA has since refuted.