Romulus (c. 771 BC—c. 717 BC) and Remus (c. 771 BC—c. 753 BC) are the traditional founders of Rome, appearing in Roman mythology as the twin sons of the priestess Rhea Silvia, fathered by the god of war, Mars. According to the tradition recorded as history by Plutarch and Livy, Romulus served as the first King of Rome.
They are among the most significant feral children in ancient mythology. Feral children (that is, human children raised by non-human animals) in mythology and fiction are often depicted as having superior strength, intelligence and morals to "normal" humans, the implication being that because of their upbringing they represent humanity in a pure and uncorrupted state.
There is also the (true) story of a boy found in France, who appears to have been raised without human contact. In typical fashion, I can't remember whether it was last century, or earlier, or any other details except that he was cared for by a doctor who tried to 'civilise' him, but never succeeded. Never learned to talk or adopt normal social behaviour. Will send the details if I remember more.