Son of Rumpelstiltskin is the 27th episode of Season 2 of Fractured Fairy Tales.
A young funny little man in a green suit (Daws Butler) lives in a tree with his father who wears an identical suit. The father tells his son that they are magic folk who are meant to intervene in non-magical people's problems, then he pushes his son out of the tree, and the son wanders into the capital of the kingdom. The local Miller has told the King that his daughter can spin straw into gold, and the King takes him up on this claim, declaring that he will marry the Miller's daughter if she delivers. The young woman, fearing she is doomed, cries out mournfully, and the little man agrees to help her in exchange for her firstborn child. The King comes in at dawn, sees the pile of newly spun gold, and declares "I'm rich!...er!"
One year later, the young woman is now the Queen, and the little man comes and says she must give her newborn son up for adoption by the him, so he can raise the son as a green-clad man living in trees - unless she can guess the little man's name. Starting with ordinary names like Frank, George, and Billy, she then turns to researching all encyclopedias of obscure names. Finally, she exhausts all possibilities and gives up, but asks for one favor. Before she hands over her son, the little man should tell her his name as a courtesy. He agrees, but suddenly realizes that he does not know his own name. At the advice of a "wise man" who lives in a sanitation tunnel, the little man sets up a mailbox. Someone sends him a letter marked Rumpelstiltskin, and he is so ashamed and embarrassed by this silly name that he forfeits all claim on the Queen's son, changes his name to Louie Smith, and becomes a television host. The Queen keeps her son, and all the characters live happily ever after.
The title is a misnomer, as the central character is not the son of Rumpelstiltskin. He is Rumpelstiltskin himself (at least until he changes his name to Louie Smith), and does not have a son. (As he fails in his attempt to adopt the Queen's son.) While it's possible that his father is also named Rumpelstiltskin, this is never stated.