Samarth Bangari's unusual friendship was discovered when the youngster was spotted alone in his village, in Karnataka's Dharwad district, playing with nearly two dozen grey langurs.
The infant's uncle Barama Reddy said it was "strange" for the monkeys to behave like that, and villagers feared the boy would be attacked while his parents worked in a nearby field.
The monkeys kept returning, day after day, to visit their young friend in Allapur, roughly 400 kilometres from Bangalore, his uncle said.
"Since that day, the monkeys haven't missed a day. They come to the house around the same time," Reddy told AFP.
"Even if he is sleeping, they first wake him up, and then sit with him for an hour or two."
"Everyone thinks that he is special and they are communicating with each other, and can understand what is being said," Reddy said.
Mowgli was a character in "The Jungle Book", Rudyard Kipling's tales about a boy who grew up in the wild in India, and is often used as a shorthand for people who are able to bridge the human-animal divide.