who was the baby in elf

The character you're referring to is Buddy, played by Will Ferrell, in the film Elf. He's a human who was accidentally transported from the North Pole to New York City when he was a baby, and he grows up thinking he's a human. He eventually discovers his true identity and makes his way back to the North Pole to meet his father, Santa Claus, and other elves. Buddy's story is a heartwarming tale of self-discovery and family, and it has become a beloved Christmas classic.