Feral Children: A feral or wild child is a human child who has lived isolated from human contact from a very young age, and has little or no experience of human care, behavior, or, crucially, of human language.
The Indian Wolf Boy
The Leopard Boy
In a more recent case Ng Chhaidy went missing from Mizoram at the age of 4. She was found in Myanmar 38 years later and brought home to be rehabilitated.
Kamala and Amala
Singh's claims were later dismissed as a fabricated story by a French surgeon, and refuted by researchers, however, what they do not refute is the existence of feral children. You can read about the controversy here.
Photographer Julia Fullerton Batten who discovered the same recreated some stories about feral children from around the world in a series of beautiful photographs. All the images in the article are sourced from the same shoot.